A Hard Climate for Penguins and Butterflies

These three Magellanic penguin chicks died of hypothermia after a rainstorm.

Adaptation can be tricky. Extreme weather is challenging the survival of certain penguins and butterflies, yet DNA from Neanderthals lives on in modern humans 30,000 years after they went extinct. It’s enough to turn a cave man’s eyes blue.

Developments

Climate: Rain and Heat Batter Penguins

Intense storms and warmer temperatures are making life harder for Argentina’s Magellanic penguins, which didn’t have it easy in the first place. A new study showed that temperature changes and more heavy rains in Punta Tombo, home to about 200,000 breeding pairs of the animals, were killing nearly as many chicks as predators and starvation. The study, published in the journal PLoS One, was praised as one of the first to show how climate change affects animals directly rather than through their food supply or habitat.

Image
Credit...Dee Boersma/University of Washington

Biotechnology: A New Recipe for Stem Cells

Have scientists discovered a cheap and easy way to make stem cells? Two papers in the journal Nature described a technique, so far used only with mice, for turning cells from the body into stem cells by bathing them for half an hour in a mildly acidic solution. There is widespread hope among researchers that stem cells could one day be used to repair damaged cells and organs in the body.

Some scientists called the technique a potential paradigm changer, but others urged caution. “It’s too early to say this is better, safer or more practical” than existing methods for creating stem cells, said Sheng Ding, a scientist at the University of California, San Francisco, and the affiliated Gladstone Institutes.

Biology: A Shrinking Home for Butterflies

The annual winter migration of monarch butterflies from Canada and the United States to Mexico has been called one of the world’s great natural spectacles. But the number of butterflies making the journey has become so small — about 35 million, experts guess — that it may never rebound to levels seen even five years ago.

The cause? Extreme weather and a dwindling habitat, said the Mexican government and the World Wildlife Fund at a news conference. In December the span of forest inhabited by the monarchs in winter had shrunk to a bare 1.65 acres, they said, just 56 percent of last year’s total, itself a record low.

Genetics: Neanderthal Genes Hang Around

The genetic portrait that was established from a Neanderthal toe bone late last year continues to yield insights. By comparing that genome with those of 1,004 living people, an international team of scientists was able to identify specific segments of Neanderthal DNA in each person’s genome. Published in the journal Nature, the study showed that humans do not have a lot of Neanderthal DNA, but some Neanderthal genes proved useful enough, evolutionarily speaking, to have become very common. In particular, non-African people have a lot of Neanderthal genes involved in their skin and hair. A second study using different methods came to similar conclusions.

A Blue-Eyed Cave Man

The remains of a man who lived in Spain about 7,000 years ago are challenging what scientists thought about the evolution of some human traits, The Guardian reported. By decoding the man’s genome using DNA extracted from a wisdom tooth, researchers in Barcelona concluded that he had blue eyes, dark skin and brown or black hair. That was a surprise, because the mutation for blue eyes was thought to have arisen more recently than the mutations that cause lighter skin. The study, published in Nature, suggests that blue eyes appeared in Europe before lighter skin.

Coming Up

Space: A Global Picture of Precipitation

NASA will launch a satellite from Japan this month that should provide a near-global picture of precipitation on Earth, Scientific American reported. The Global Precipitation Measurement Core Observatory will use its own dual-frequency radar instruments, as well as those of other satellites, to measure rainfall and snow around the world. Though many developed countries already have ground-based instruments for detecting precipitation, gaps persist over oceans and less-developed countries. “It’s kind of like a black hole for precipitation,” said one atmospheric scientist.

In Other News

fake money

Keywords clouds text link http://alonhatro.com

Dịch vụ seo, Dịch vụ seo nhanh , Thiết kế website ,  máy sấy   thịt bò mỹ  thành lập doanh nghiệp
Visunhomegương trang trí  nội thất  cửa kính cường lực  Vinhomes Grand Park  lắp camera Song Phát thiết kế nhà thegioinhaxuong.net/

Our PBN System:  thiết kế nhà xưởng thiết kế nội thất thiết kế nhà tem chống giả https://thegioiapple.net/

aviatorsgame.com ban nhạcconfirmationbiased.com 
radiantcitymovie.comeatatdistrict.com
chaletedelweiss.useve-razor.com
occastudios.commoscasenlasopa.net
skaratoken.comshowdx.com
thelettersmovie.comheritage-gifts.com
singstreetmovie.comdeadaccountsonbroadway.com
moscasenlasopa.netratchasima.net
eatatdistrict.comthe-movie-trailer.com 
theboroughraleigh.comradio-electronics.co
mariankihogo.com  ốp lưngGiường ngủ triệu gia  Ku bet ku casino

https://maysayhaitan.com/  https://dovevn.com/ buy fake money https://sgnexpress.vn/ máy sấy buồn sấy lạnh

mặt nạ  mặt nạ ngủ  Mặt nạ môi mặt nạ bùn mặt nạ kem mặt nạ bột mặt nạ tẩy tế bào chết  mặt nạ đất sét mặt nạ giấy mặt nạ dưỡng mặt nạ đắp mặt  mặt nạ trị mụn
mặt nạ tế bào gốc mặt nạ trị nám tem chống giả

https://galaxymedia.vn/  công ty tổ chức sự kiện tổ chức sự kiện
Ku bet ku casino
Sâm tươi hàn quốc trần thạch cao trần thạch cao đẹp

suất ăn công nghiệpcung cấp suất ăn công nghiệp

https://docs-cashshop.com/
https://galaxymedia.vn/dich-vu-to-chuc-su-kien-la-gi-quy-trinh-to-chuc-su-kien-nhu-the-nao-id3108.html

© 2020 US News. All Rights Reserved.