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Birds keep a layer of soft, fluffy down feathers to regulate body temperature


Birds keep a layer of soft, fluffy down feathers to regulate body temperature
Feathers are a sleek, intricate evolutionary innovation that makes flight possible for birds, but in addition to their stiff, aerodynamic feathers used for flight, birds also keep a layer of soft, fluffy down feathers between their bodies and their outermost feathers to regulate body temperature.
Using the Smithsonian s collection of 625,000 bird specimens, Sahas Barve, a Peter Buck Fellow at the Smithsonian s National Museum of Natural History, led a new study to examine feathers across 249 species of Himalayan songbirds, finding that birds living at higher elevations have more of the fluffy down the type of feathers humans stuff their jackets with than birds from lower elevations. ....

National Museum Of Natural History , District Of Columbia , United States , Sahas Barve , Emily Henderson , Feather Identification Lab , Smithsonian National Museum Of Natural History , Peter Buck Fellow , National Museum , Natural History , தேசிய அருங்காட்சியகம் ஆஃப் இயற்கை வரலாறு , மாவட்டம் ஆஃப் கொலம்பியா , ஒன்றுபட்டது மாநிலங்களில் , சாச் பார்வ் , எமிலி ஹென்டர்சன் , இறகு அடையாளம் ஆய்வகம் , ஸ்மித்சோனியன் தேசிய அருங்காட்சியகம் ஆஃப் இயற்கை வரலாறு , பீட்டர் பக் சக , தேசிய அருங்காட்சியகம் , இயற்கை வரலாறு ,

'Language, Culture, Storytelling'! Welcome to The Mother Tongue Film Festival


Language, Culture, Storytelling ! Welcome to The Mother Tongue Film Festival
Published February 15th, 2021 - 11:26 GMT
Mother Tongue Film festival (Twitter)
Highlights
Featuring 45 films in 39 languages from all over the world, the festival “opens on the United Nations’ International Mother Language Day, February 21, and runs through May.”
The Smithsonian Institute’s Recovering Voices initiative offers global audiences a film festival online that centres around “language, culture and the power of storytelling” and features 45 films in 39 languages.
The Smithsonian’s Recovering Voices (RV) initiative was founded in 2009. It is “a collaborative program of the National Museum of Natural History, the National Museum of the American Indian, and the Center for Folklife and Cultural Heritage that partners with communities around the world to revitalise and sustain endangered languages and knowledge.” ....

United States , National Museum Of Natural History , District Of Columbia , National Museum Of The American Indian , Joshuaa Bell , Jonathan Kasstan , Amalia Cordova , Maria Sojob Tsotsil , Smithsonian Institute Recovering , United Nation International Mother Language Day , Smithsonian Center , Smithsonian National Museum Of Natural History , Smithsonian Institute , Recovering Voices , National Museum , Natural History , American Indian , Cultural Heritage , Teko Haxy , Being Imperfect , Maria Sojob , Indigenous Maya , ஒன்றுபட்டது மாநிலங்களில் , தேசிய அருங்காட்சியகம் ஆஃப் இயற்கை வரலாறு , மாவட்டம் ஆஃப் கொலம்பியா , தேசிய அருங்காட்சியகம் ஆஃப் தி அமெரிக்கன் இந்தியன் ,

Higher elevation birds sport thicker down

A new study examines feathers across 249 species of Himalayan songbirds, finding that birds at higher elevations have more of fluffy down than lower elevation birds. Finding such a clear pattern across many species underscores how important feathers are to birds ability to adapt to their environments. Furthermore, finding that birds from colder environments tend to have more down may one day help predict which birds are vulnerable to climate change simply by studying feathers. ....

United States , Sahas Barve , Feather Identification Lab , Smithsonian National Museum Of Natural History , Peter Buck Fellow , National Museum , Natural History , Climate Science , Biomechanics Biophysics , Ecology Environment , Zoology Veterinary Science , Climate Change , ஒன்றுபட்டது மாநிலங்களில் , சாச் பார்வ் , இறகு அடையாளம் ஆய்வகம் , ஸ்மித்சோனியன் தேசிய அருங்காட்சியகம் ஆஃப் இயற்கை வரலாறு , பீட்டர் பக் சக , தேசிய அருங்காட்சியகம் , இயற்கை வரலாறு , காலநிலை அறிவியல் , பயோமெக்கானிக்ஸ் உயிர் இயற்பியல் , சூழலியல் சூழல் , ஸுவாலஜீ கால்நடை அறிவியல் , உயிர் தகவலியல் , காலநிலை மாற்றம் ,

DNA shows ancient Siberians domesticated dogs, who then helped settle America -- Secret History -- Sott.net


© David Meltzer
Evolutionary biologist Greger Larson flanks a whiteboard in his office at Oxford as he and his co-authors turn it into a palimpsest in November 2018 for their PNAS study. Human events are marked in blue and dog events in orange, with northeast Asia on the left and North America on the right. Co-author David Meltzer says it s what scientific convergence sometimes looks like. The study uses newly discovered archaeological sites and human-genome work to assert connections stretching further back than archaeological, paleontological, and other biological evidence could previously establish with any certainty.
Audrey Lin from the Smithsonian s National Museum of Natural History, who was not involved in the study, told RFE/RL: ....

United States , Czech Republic , Nordrhein Westfalen , Waals Gewest , Orenburgskaya Oblast , Saudi Arabia , Illinois River , Audrey Lin , Laurent Frantz , Ettore Mazza , Angela Perri , Greg Larson , Greger Larson , Peter Savolainen , Bering Strait , David Meltzer , Kelsey Witt , David Ian Howe Ethnocynology , David Ian Howe , Southern Methodist University , Stockholm Royal Institute Of Technology , Smithsonian National Museum Of Natural History , Us National Park Service , Proceedings Of The National Academy Sciences , Brown University , Chicago Field Museum ,