Dr. Eske Willerslev, director of the Center for GeoGenetics at the University of Copenhagen, earlier this month.
The Sorpe reservoir in northwest Germany, one of four freshwater reservoirs observed in a recent study that found that carbon dioxide absorbed in lakes, rivers and streams can affect entire ecosystems.
The chambered nautilus propels itself by sucking in and shooting out water, and uses far less energy to do it than other swimmers that use jet propulsion.
A view of the Milky Way and neighboring galaxies, containing more than a billion stars, released by the European Space Agency’s Gaia mission.
From left, Hanna Zavorotnya, Maria Zagorna and Maria Shovkuta are among the women who chose to return to the Chernobyl exclusion zone after the 1986 nuclear accident.
A European rabbit. A new report debunked the long-held scientific tale that rabbits were domesticated in 600 A.D. because a pope declared their fetal meat to be like fish and therefore O.K. to eat during Lent.
A spokeswoman for China’s manned space program presented a replica of the Tiangong 1 space station (left half of the model) in 2012 with a manned spacecraft, Shenzhou 9, attached.
Verreaux’s Eagles nesting in South Africa’s mountains are not as successful as their neighbors nesting in an agricultural landscape.
A remnant from a Type 1A supernova observed in the Milky Way, one of the cosmic markers of how fast the universe is expanding. Observing exploding stars helped astronomers first discover the existence of dark energy nearly 20 years ago.
A change encounter with the colors of a squid.
Signs of a henge, a man-made enclosure from thousands of years ago thought to serve as a gathering place, were photographed by a camera-enabled drone on Monday.
An artist's impression of 2004 EW95, a relic of the primordial solar system, which scientists believe originated in the asteroid belt between Mars and Jupiter but now floats beyond Neptune.
Is the pleasure of enjoying a Leonardo da Vinci painting really any different than the pleasure we get from eating chocolate?
Manu Prakash with his mother, center, in India, where it was not long before he began showing an appetite for science.
Fur seals can switch off and on R.E.M. sleep when they're in the sea and on land, a pattern never seen before. Scientists believe it might mean R.E.M. sleep helps generate heat in our skulls, like shivering for the brain.
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