Saturday, June 23, 2012

Ark. Supreme Court declares execution law unconstitutional

By msnbc.com staff and news services

The Arkansas Supreme Court struck down the state's execution law Friday, calling it unconstitutional.

In a split decision, the high court sided with 10 death row inmates who argued that, under Arkansas' constitution, only the Legislature can set execution policy. Legislators in 2009 voted to give that authority to the Department of Correction.

The 2009 law says a death sentence is to be carried out by lethal injection of one or more chemicals that the director of the Department of Correction chooses.


Death row inmate Jack Harold Jones Jr. sued the head of the correction department in 2010, challenging the constitutionality of the law. Nine other inmates have since joined the suit, asking that the law be struck down.

The state, meanwhile, asked the court to free up several executions it halted because of this lawsuit.

It wasn't immediately clear what the court's ruling will mean for the 40 men on death row in Arkansas. There aren't any pending executions, and the state hasn't put anyone to death since 2005, in part because of legal challenges like this one.

Three Arkansas inmates who were scheduled to be put to death last summer were spared by the state Supreme Court almost exactly a year ago. Jason Farrell McGehee, Bruce Earl Ward, and Marcel Wayne Williams, all of whom are plaintiffs in the lethal injection lawsuit, received stays of executions from the high court on June 23, 2011, according to ArkansasNews.com.

Josh Lee, an attorney for the death row inmates who challenged the law, declined to comment Friday.

During oral arguments last week, Lee said the state would have two options if the court found the law unconstitutional.

"The Legislature could either choose to stick with the 1983 statute, which everybody concedes is constitutional, or the Legislature could decide we want to amend it," Lee said last week.

The state adopted lethal injection as its method of capital punishment in 1983. There have been legal challenges to the way the state kills its condemned prisoners since then. In 2009, in the midst of a legal battle over lethal injection, the state Legislature passed the law that the court struck down Friday.

Joseph Cordi, an attorney for the state, told the Supreme Court last week that he thought the state would be left with the earlier law if the court struck down the entire statute.

Part of the 2009 law also says that in the event it's found unconstitutional, death sentences will be carried out by electrocution.

"That would be up for the lawyers to untangle and figure out what it means, but that's a possibility," prisons spokeswoman Dina Tyler said.

Since the reinstatement of capital punishment by the U.S. Supreme Court in 1976, Arkansas has been the only state to ever conduct three executions on the same night, according to The Death Penalty Information Center, a non-profit organization. Triple executions were done twice in Arkansas's history: first on Aug. 3, 1994, under Gov. Jim Guy Tucker, and then again on Jan. 8, 1997, under Gov. Mike Huckabee, records on DeathPenaltyInfo.org show.

The Associated Press contributed to this report.

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Super-social spaceman shares his story

NASA via Twitpic

NASA astronaut Ron Garan looks into the camera from outside the International Space Station in July 2011. "Knocking on the door to come back in #FromSpace after yesterday's spacewalk," Garan wrote on Twitpic.

By Alan Boyle

You might think it's cool enough that NASA astronaut Ron Garan has spent months aboard the International Space Station, but he?s become even better-known as a social-media maven. This month he passed the 2 million mark for Google+ circles, putting him at No. 21 on the Google+ Top 100. His Fragile Oasis postings are a highlight on the Web, Facebook and Twitter. His "Ask Me Anything" exchange with Reddit users went so well he's thinking of doing it again.

So what's the secret to his success? It's really not a secret at all: He?s got a good story to share, about the beauty and fragility of planet Earth.


The 50-year-old New York native is a former Air Force fighter pilot who has degrees in business economics and aerospace engineering. He joined the astronaut corps in 2000, and his training for spaceflight included a turn as an "aquanaut" for NASA's NEEMO underwater research mission in 2006. Garan has been up in space twice ? in 2008, on the shuttle Discovery to help deliver Japan's Kibo lab to the International Space Station; and just last year for a nearly six-month tour of duty on the station.

Garan says another stint on the space station is "always a possibility, down the road." But right now, he's focusing on NASA's Open Government Initiative, which aims to build stronger collaborative ties between government, industry and the general public. That means social engagement isn't just something he does in his spare time. It's part of his job.

During a recent interview, Garan talked about how he became a super-social spaceman, and what he's learned from the adventure. Here are some edited excerpts of the Q&A:

Cosmic Log: When you come into contact with the public, what do you find they?re most curious about?

Garan:?"Well, what they?re most curious about is the basic question of what life is like, living in space. It really is a marvelous experience. It?s very interesting in a lot of respects ? and probably the greatest part about it is that it gave me an incredible sense of appreciation for what we have here on our planet. Everything from just simple things that define the beauty of life on our planet ? the breeze in your face, and the smell of flowers, watching a flock of birds and a million other things. After you?re up there for a while, those are things that?you really start to miss.

"I had the opportunity to have a short-duration flight on the space shuttle Discovery back in 2008, during which I was up there for two weeks, and then a long-term one where I was up for five and a half months. And it?s a very different experience. You have the same views, you have the same environment that you live in. But being able to see the earth, day in and day out, and watch the earth change ... and to really start to miss some of the things that I took for granted, that really gives you that appreciation."

Ron Garan / NASA

A fish-eye view of the International Space Station, captured by Ron Garan last July, features the Alpha Magnetic Spectrometer in the foreground. A Russian Progress cargo ship and a Soyuz crew capsule are docked on the left end of the station. The structure extending to the left of the AMS is a thermal radiator. One of the station's gold-colored solar arrays is visible in the background. And off to the right, the shuttle Atlantis is docked to the station's Tranquility module.

Q: So how did the Fragile Oasis website enter into the mix?

A:?"That came out of my shuttle mission in 2008. I had a little bit of frustration. I imagine it?s like when you go to the Grand Canyon, and you?re there by yourself, and you sit there at the rim of the Grand Canyon and you?re looking out over this amazing thing. And imagine that very, very few people have been able to have that experience. For me, at least, that would be frustrating, and the experience would not be as rich as it would be if I had the opportunity to share that with people. So I was frustrated during my shuttle mission that I couldn?t share the experience.

"When I got assigned to my long-duration mission, there?s two and a half years of training, and during that two and a half years, I really brainstormed how I could do that. We came up with Fragile Oasis, not just to have it as a website where we could tell stories about space, but the goal was always to provide a platform for people to follow along on the mission, not as spectators but as fellow crew members. To have an interactive way to do it.

"We had some significant technical challenges in getting that thing off the ground, and it?s still a work in progress. It doesn?t have a lot of the interactive features that we wanted it to have, but we?re working on it. When I launched to the International Space Station, and I had the five and a half months up there, I really was very thankful that I had this tool, this platform, to be able to communicate. And in the meantime, we had the exponential increase in the popularity of social media tools.

"First I did Facebook, but I didn't see that as a public outreach tool. I saw that as a way to connect with old friends, and I was just using it on a personal basis. On the other hand, I started Twitter for one reason: I saw it as a way to do education outreach. I could say, I?m learning about this experiment we?re going to be doing in space, and I?d put a link on there to the experiment's website and the science behind it. I saw that as a very powerful way to do outreach. I now see the benefits of outreach in other platforms as well, including Facebook and obviously Google+. In the case of Google+, I see a very robust mechanism to share the space program and the experience of living in space with a lot of interactive features on that platform."

Q: With all your experience in social media, do you find that you favor one tool over the other? From your comments, it sounds as if you?re seeing some differentiation in how those different tools can be used. Particularly with Google+, you just recently passed the 2-million-follower mark. That must be one of the big successes for your efforts.

A:?"Well, I think all the platforms offer slightly different tools to tell the story. I think they all fit together really well, actually. So it?s not a 'one-platform' type of message. We want to reach the broadest audience we can, because the excitement of spaceflight is global. It?s for all humanity. So the more tools we can use to tell that story, and the more people we can get involved with the story, the better off the whole message will be."

Q: Did you have to do a selling job with NASA to do the sorts of things you?re doing?

A:?"It took a while to catch on, but it?s catching on now across the board. We realize the benefit of social media. I?m on some social-media committees now, on some working groups to help not only crew members and astronauts, but also thousands of other people who work in the space program. They have a very compelling story as well. We?re trying to find the best way to get that story out. And what we?re finding is that just letting people tell their story in the way they want to tell it is the best way to do it.

"Obviously, there have to be guidelines. But the more leeway we can give people in the space program to tell their story, the richer the experience will be, both for the people who are reading it and for the people who are doing it. That?s one of the cardinal rules here, to give people as much leeway as we possibly can."

Q: Are there any guidelines or favorites that you want to pass along to people who want to be closer in touch with the space adventure?

A:?"Oh, yeah. There are tons and tons of people. Most of the astronauts who fly in space right now have Twitter accounts. They?re all on there. There?s also @NASA_Astronauts, where we try to retweet, as best we can, everything from all the astronauts. There?s @NASA, the official Twitter account. There?s the Facebook version, and soon the Google+ version of all these as well. There?s commercial spaceflight: @SpaceX has a social media presence. There are people outside the space agency who are involved in telling the story as well, such as @YurisNight and #spacetweeps.

"What we?re finding through this is that it?s not just the official word from NASA, the European Space Agency and the Japanese space agency. There are citizen scientists and all these other groups that have formed around the idea of space exploration, and they really do a great job of telling the story as well. It?s obvious that there?s a lot of passion and heart and soul that?s put into this."

Q: Is there something about the space story that particularly resonates with social media?

A:?"I think it?s because it?s a human endeavor, and throughout the 50 years of human spaceflight, it?s always been a select few people who have gotten to fly in space, and we?ve relied on them to come back and tell us what it was like. Now, through technology and through these new platforms, we can bring people along with us on the missions and have them experience this is real time. You can see example after example of this.

"An easy example is, if one of us sends out a tweet with a picture, let?s say, and we misidentify the geographic location, we?re going to find out about that pretty fast. That happened to me on my mission, and I thanked the person who brought that to my attention. I started sending pictures to that person first, to make sure I got it right. We don?t have a lot of time up there, and all the pictures and all the social media that we do is in our free time. So to have people on the ground, crowdsourcing or open-sourcing or however you want to put it, that really empowers us to do more. It makes communication much more effective."

Q: Have you ever thought if it would be possible to boil down the glory of space down into one tweet? Is there any elevator talk you?ve thought about giving in 140 characters, about what it?s like to fly in space?

A:?"You?d need at least 147 characters to do that ... no. I know I couldn?t do it. That would be a pretty remarkable feat."

Q: What?s the one thing that you?d like people to know about spaceflight.

A:?"In 140 characters?"

Q: Not 140 characters, but what?s the one biggest message that you think the space experience provides for people on Earth?

A:?"Well,? to go back to the reason we started Fragile Oasis: The really compelling reason is that we wanted to use this perspective we have on the planet to inspire people to go out and make a difference, and make the world a better planet. The one gift that I think we get when we fly in space is this perspective.

"You don't necessarily have to be in space to get this perspective, but being in space really reinforces it: You see how fragile the planet is. You see how beautiful it is, how peaceful it looks. Then you realize that life is not as beautiful for everybody on the planet as it looks from space. That's a very compelling thing to experience, and hopefully it serves as a call to action, to not accept the status quo and make life on the planet as beautiful as it looks. That's the No. 1 thing that I want to get across."

NASA

The International Space Station looks like little more than a speck with solar panels in this picture, which was taken from the shuttle Atlantis during its approach on July 10. A first-quarter moon shines on the right side of the frame.

Where in the Cosmos
Garan and his colleagues at Fragile Oasis offer a cornucopia of outer-space imagery and blog postings, including this picture of the International Space Station and the moon, as seen from the shuttle Atlantis during its approach for docking last July. The photo served as today's quiz picture in the "Where in the Cosmos" contest, presented weekly on the Cosmic Log Facebook page.

Len Whitney's comment was my favorite: "I believe it's a TIE fighter ... but those are short-range fighters, we're too far out in space ... Must have taken off from that moon ... Wait a second ... that's no moon!!!! It's a space station!"

For figuring out so quickly that the picture showed a moon and a space station, I'm sending 3-D glasses to Facebook followers Matt Jaworski and Lawrence Johnson. I'm also reserving a pair for Whitney. To make sure you're in on next week's contest, click the "like" button on the Cosmic Log Facebook page and join the alliance. It's not a trap!

More about NASA and social media:


Although Ron Garan is the highest-rated astronaut on the Google+ list, props also deserve to go out to Mike Massimino, the first NASA astronaut to tweet from space and NASA's top astronaut when it comes to Twitter rankings.

Alan Boyle is msnbc.com's science editor. Connect with the Cosmic Log community by "liking" the log's Facebook page, following @b0yle on Twitter and adding the?Cosmic Log page?to your Google+ presence. You can also check out?"The Case for Pluto,"?my book about the controversial dwarf planet and the search for new worlds.

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Friday, June 22, 2012

Speaking to young readers at Fairmount Public Library ? Writing of ...

On June 8, 2012, I spoke to young students at Fairmount Public Library about what it?s like to be an author and write books. What fun to chat with those little ones about reading and writing! They liked looking at my nine children?s books. When I pointed out my name on the cover of the book, their little eyes widened!

Chatting with young readers at Fairmount Public Library

?You wrote that??

?Yes!?

My name was put on the library?s sign out front!

Fairmount, for those who don?t know, is the birthplace of famed actor from the past James Dean.

I think these little ones are just as exciting to be with as any movie actor. We shared our favorite book titles and favorite places to read (When I was growing up, it was in the tree in our back yard!).

These kids loved learning about the process of writing books.

After my talk, the kids ate lunch ? right inside the library! I?ve never seen kids do this, but I thought how great it was that Library Director Linda Magers encourages kids to do this following a story time session. It?s like an air-conditioned picnic with friends every week and no ants!

Ms. Magers purchased a copy of each of my books for her young readers. That?s a sure sign of a caring librarian to reinforce the contact with an author after the visit. Visits to speak with kids is a highlight for me, one I?d like to?practice regularly.

If you?d like me to speak to your church, library, school or civic group about the subject of writing (or other subject that can be negotiated), please contact me. xxxkjreusser@adamswells.comxxx (remove the x?s).

One of my best writing buds, Cathy Shouse, lives in Fairmount and dropped by to say Hi!

Have a great day!

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NASA sees Chris become first hurricane of Atlantic season

NASA sees Chris become first hurricane of Atlantic season [ Back to EurekAlert! ] Public release date: 21-Jun-2012
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Contact: Rob Gutro
Robert.j.gutro@nasa.gov
443-858-1779
NASA/Goddard Space Flight Center

NASA satellites monitoring the life of Chris in the Atlantic saw the tropical storm become the first hurricane of the Atlantic Ocean season on June 21, 2012.

Infrared satellite imagery from NASA's Aqua satellite have revealed that the clouds around Hurricane Chris' eye have reached a cold peak early on June 21 when it was first designated a hurricane, and have since warmed. The thunderstorms that surround Chris' eye are now between -60 and -70 Celsius. Cloud top temperatures that cold indicate strong, high, thunderstorms with the potential for heavy rainfall.

When thunderstorm cloud tops cool, it means there's more uplight in the atmosphere, which can push cloud tops higher and build stronger thunderstorms. When cloud top temperatures warm, it means the cloud tops are falling, and the push of the air upward is lesser than it was before, and the storm is weakening. As a result, forecasters at the National Hurricane Center expect Chris to become a post-tropical cyclone on Friday, June 22. That weakening is expected because Chris is moving into stable air and cooler waters.

NOAA's GOES-13 satellite captured a visible image of Chris on June 21 at 1445 UTC (10:45 a.m. EDT). The image was created by NASA's GOES Project at NASA's Goddard Space Flight Center in Greenbelt, Md. and it showed Hurricane Chris with a tight circulation center.

At 11 a.m. EDT, Chris had 75 mph (120 kph) winds. It was located about 625 miles (1005 km) southeast of Cape Race, Newfoundland, Canada, near 41.1 North and 43.2 West. It was moving to the northeast at 20 mph (32 kph) and had a minimum central pressure of 987 millibars.

Chris is expected to turn in the Altantic over the next couple of days. First a turn to the north and then northwest and finally south. Chris is moving around a large mid-to-upper level low pressure area and will eventually become absorbed within the upper level low in the next couple of days.

###


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?


AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert! system.


NASA sees Chris become first hurricane of Atlantic season [ Back to EurekAlert! ] Public release date: 21-Jun-2012
[ | E-mail | Share Share ]

Contact: Rob Gutro
Robert.j.gutro@nasa.gov
443-858-1779
NASA/Goddard Space Flight Center

NASA satellites monitoring the life of Chris in the Atlantic saw the tropical storm become the first hurricane of the Atlantic Ocean season on June 21, 2012.

Infrared satellite imagery from NASA's Aqua satellite have revealed that the clouds around Hurricane Chris' eye have reached a cold peak early on June 21 when it was first designated a hurricane, and have since warmed. The thunderstorms that surround Chris' eye are now between -60 and -70 Celsius. Cloud top temperatures that cold indicate strong, high, thunderstorms with the potential for heavy rainfall.

When thunderstorm cloud tops cool, it means there's more uplight in the atmosphere, which can push cloud tops higher and build stronger thunderstorms. When cloud top temperatures warm, it means the cloud tops are falling, and the push of the air upward is lesser than it was before, and the storm is weakening. As a result, forecasters at the National Hurricane Center expect Chris to become a post-tropical cyclone on Friday, June 22. That weakening is expected because Chris is moving into stable air and cooler waters.

NOAA's GOES-13 satellite captured a visible image of Chris on June 21 at 1445 UTC (10:45 a.m. EDT). The image was created by NASA's GOES Project at NASA's Goddard Space Flight Center in Greenbelt, Md. and it showed Hurricane Chris with a tight circulation center.

At 11 a.m. EDT, Chris had 75 mph (120 kph) winds. It was located about 625 miles (1005 km) southeast of Cape Race, Newfoundland, Canada, near 41.1 North and 43.2 West. It was moving to the northeast at 20 mph (32 kph) and had a minimum central pressure of 987 millibars.

Chris is expected to turn in the Altantic over the next couple of days. First a turn to the north and then northwest and finally south. Chris is moving around a large mid-to-upper level low pressure area and will eventually become absorbed within the upper level low in the next couple of days.

###


[ Back to EurekAlert! ] [ | E-mail | Share Share ]

?


AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert! system.


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Thursday, June 21, 2012

Justin Timberlake to Star in 'Baywatch' Movie?

Picture Justin Timberlake wearing red lifeguard shorts, running into the waves in slow-motion. Enjoying the mental image? You may soon be seeing it in a theater near you! The soapy lifeguard drama Baywatch, which aired from 1989 to 1999, is in the early stages of being turned into a movie -- and reportedly, Timberlake is being courted for the starring role.

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Egypt's Mubarak reported in coma, off life support

FILE - In this Saturday, June 2, 2012 file photo, Egypt's ex-President Hosni Mubarak lays on a gurney inside a barred cage in the police academy courthouse in Cairo, Egypt. An Egyptian prison official says Hosni Mubarak?s health has taken a turn to the worst and is likely to be moved out of his prison hospital to a military facility nearby. The official said Tuesday doctors reported that the 84-year old former president has fallen unconscious. He said they have used a defibrillator to restart his heart, and have been administering breathing aid. (AP Photo, File)

FILE - In this Saturday, June 2, 2012 file photo, Egypt's ex-President Hosni Mubarak lays on a gurney inside a barred cage in the police academy courthouse in Cairo, Egypt. An Egyptian prison official says Hosni Mubarak?s health has taken a turn to the worst and is likely to be moved out of his prison hospital to a military facility nearby. The official said Tuesday doctors reported that the 84-year old former president has fallen unconscious. He said they have used a defibrillator to restart his heart, and have been administering breathing aid. (AP Photo, File)

Egyptian soldiers stand guard outside the Maadi military hospital where former president Hosni Mubarak was transferred and is currently on life support after suffering a stroke in prison in Cairo, Egypt, Wednesday, June 20, 2012. The 84-year-old Mubarak suffered a "fast deterioration of his health" and his heart stopped beating, the state news agency MENA and security officials said. (AP Photo/Amr Nabil)

Egyptian soldiers stand guard outside the Maadi military hospital where former president Hosni Mubarak was transferred and is currently on life support after suffering a stroke in prison in Cairo, Egypt, Wednesday, June 20, 2012. The 84-year-old Mubarak suffered a "fast deterioration of his health" and his heart stopped beating, the state news agency MENA and security officials said. (AP Photo/Amr Nabil)

A military armored vehicle guards the Maadi military hospital in Cairo, Egypt, Wednesday, June 20, 2012. Egypt's Hosni Mubarak was on life support after suffering a stroke in prison. The 84-year-old Mubarak suffered a "fast deterioration of his health" and his heart stopped beating, the state news agency MENA and security officials said. (AP Photo/Amr Nabil)

(AP) ? Hosni Mubarak was in a coma on Wednesday but off life support and his heart and other vital organs were functioning, according to security officials.

Overnight, state media reported that the 84-year old former president, ousted in last year's uprising and now serving a life sentence in prison, suffered a stroke and was put on life support. He was transferred to a military hospital from the Cairo prison hospital where he has been kept since his June 2 conviction and sentencing for failing to stop the killing of protesters during the uprising.

His wife Suzanne was by his side in the Nile-side hospital in Maadi, a suburb just south of Cairo. The security officials said a team of 15 doctors, including heart, blood and brain specialists, was supervising the condition of Mubarak, who needed help with his breathing. The officials spoke on condition of anonymity because they were not authorized to speak to the media.

Mubarak's health scare comes at a time of heightened tension in Egypt. Both candidates in a fiercely contested presidential runoff held last weekend are claiming victory. At the same time, the ruling military council that took over from Mubarak moved to tighten its grip on power a little more than a week before they were supposed to transfer complete authority to an elected civilian administration.

The ruling generals stripped the next president of many of his powers in a declaration made just as polls closed in the runoff late Sunday night. With the decree, they gave themselves control over the drafting a new constitution and declared themselves the country's legislative power after a court last week dissolved the Islamist-dominated parliament which was freely elected about six months earlier.

The runoff pitted Mubarak's last prime minister Ahmed Shafiq against conservative Islamist Mohammed Morsi of the Muslim Brotherhood. The contest divided the country and their rival claims of victory could bring more of the turmoil that has rocked the country since Mubarak's ouster.

Mubarak was convicted of failing to prevent the killing of some 900 protesters during the 18-day uprising that forced him out of office on Feb. 11, 2011. He and his two sons, onetime heir apparent Gamal and wealthy businessman Alaa, were acquitted of corruption charges. But the two sons are held in Torah awaiting trial on charges of insider trading.

The two were by their father's side at the Torah prison hospital, but the officials said prison authorities refused their request to accompany him to the Maadi military hospital.

Associated Press

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Noisy environments make young songbirds shuffle their tunes: Baby songbirds shape their species' playlist

ScienceDaily (June 19, 2012) ? iPod owners aren't the only ones who frequently shuffle their favorite tunes. Baby songbirds do it, too, a new study shows.

A baby songbird prefers to learn the clearest versions of songs he hears and uses them to build his personal playlist for life. As a result, noise, from nature and humans, influences which songs a bird learns to sing and can create lasting changes to his species' top tunes, the study's results suggest.

"There's been an enormous amount of interest in how anthropogenic factors affect the channels animals use for communication and in particular how human noise affects birdsong," said Duke biologist and study co-author Steve Nowicki. "As far as we know, this is the first study that can link noise to cultural evolution of bird song."

The team designed the study to test a 30-year-old hypothesis suggesting that young birds memorize and later sing the clearest songs they hear during their critical learning period. In the experiment, Nowicki and his collaborators collected nine male, swamp-sparrow nestlings and hand-raised them in a soundproof room.

Twice a day for 12 weeks, the birds heard recordings of 16 song types sung by adult males of their species. Eight song types were degraded, or noisy, by being broadcast across a typical sparrow territory of 25 meters and then re-recorded. The other eight were clean copies of similar-sounding, but different songs. When the birds later matured and began to sing, they only repeated the clear songs.

"It wasn't too surprising that the sparrows preferred them," said Duke behavioral ecologist Susan Peters, lead author of the study. "What is exciting is how clear-cut the results are. All of the birds learned clear songs and none learned any of the degraded songs," she said.

The results appeared online June 20 in the journal Biology Letters.

This "simple" but "elegant" experiment "says a great deal about how birds put to use their extraordinary ability to hear small-time differences," said Eugene Morton, a biologist at York University in Canada who was not involved in the study.

The birds use this ability to learn songs that transmit through their habitat with the least amount of degradation. "In this way, the birds themselves reject songs less well suited to their environment," an example of cultural selection, Morton said.

Scientists consider the song shifts to be selected culturally, rather than naturally, because the songs are learned, not innate.

"This is important because cultural selection can happen more rapidly than natural selection,??? Peters said. ???It helps to explain why birdsong is so diverse," and shows evidence that song variation depends on the bird???s habitat.

She added that noise from cities and humans would have the same effect on song selection. "We already knew that some birds can adjust some features of their song when confronted with anthropogenic noise, and now we know that this may have an impact on cultural transmission of their song," she said.

If naturally noisy songs are less desirable to learn, then songs shaped by human noise are probably less likely to be passed down and learned generation after generation. "Who would have thought that a swamp sparrow song might be affected by human activity?" Peters said.

Peters and Nowicki worked on the NSF-funded study with Elizabeth Derryberry, a behavioral ecologist at Tulane University and Louisiana State University.

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Story Source:

The above story is reprinted from materials provided by Duke University. The original article was written by Ashley Yeager.

Note: Materials may be edited for content and length. For further information, please contact the source cited above.


Journal Reference:

  1. S. Peters, E. P. Derryberry, S. Nowicki. Songbirds learn songs least degraded by environmental transmission. Biology Letters, 2012; DOI: 10.1098/rsbl.2012.0446

Note: If no author is given, the source is cited instead.

Disclaimer: Views expressed in this article do not necessarily reflect those of ScienceDaily or its staff.

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