Adult emperor penguins and their chicks near a research station in Terre Adélie, Antarctica. Researchers found that male penguins from one colony often slipped out to hunt during breeding season.
Alia Lesnek, left, and Charlotte Lindqvist of the University at Buffalo, observing boulders on Dall Island in Alaska. Scientists have found evidence in Alaska’s rocks that the first people to populate the Americas were island-hopping sea-farers.
A U.F.O. in New Mexico in 1957. For astronomers, the biggest problem with alien visitation is not the occasional claim of mysterious light in the sky, but the fact that we’re not constantly overwhelmed with them.
A sauropod footprint found in Scotland was among several that included tracks left by smaller, two-legged meat-eaters. Their presence together upends a theory that the larger plant-eaters waded into shallow, muddy waters to evade predators.
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.
An image captured from NASA TV showing astronaut Mike Hopkins during a spacewalk outside the Ineternational Space Station.
Using tools originally developed for medicine, manufacturing and geology, researchers were able to discover new insights into “La Miséreuse accroupie,” a 1902 painting by Pablo Picasso from his “Blue Period.”
“I am a retired patent attorney,” said Barbara Rae-Venter. “None of this is a planned event.”
The spotted lanternfly can lay eggs on almost any surface and feeds on a broad range of plants, including many commercial crops.
An artist’s rendering of an Earthlike exoplanet orbiting another. Scientists haven’t been able to measure an exoplanet’s tilt yet, but some suspect that a planet’s tilt is key to supporting life.
New research suggests there is ice water up there, in craters at the poles where it’s dark and cold.
From left, Daniel Riley, Etosha Cave, Ilan Gur and Steven Kaye of the Cyclotron Road program at the Lawrence Berkeley National Laboratory, which has enrolled scientists who are starting energy-related research.
This mummified, severed head was recovered from an ancient Egyptian tomb in 1915. Scientists needed to collect DNA to figure out whom the head belonged to.
A leech, Haemadipsa zeylanica, in Thailand. Scientists have found they can survey the biodiversity of a forest with DNA analysis of leeches’ last blood meals.
Creatures as diverse as the humpback whale and the ladybug all descend from the very first animal, which appeared hundreds of millions of years ago.
The large Whirlpool Galaxy, left, is known for its sharply defined spiral arms.
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