Marmot pups near Crested Butte, Colo. Researchers tracked yellow-bellied marmots’ interactions for 13 years and found that more solitary marmots lived longer lives.
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 view of the asteroid Ryugu captured by the Hayabusa2 spacecraft on Sunday, from a distance of about 40 kilometers.
Many different species do similar things. The pencil sea urchin and green sea urchin, for example, are both grazers in the coastal waters of the Galapagos Islands.
Humpback whales in the southern oceans around Antarctica appear to be breeding successfully, recovering their population.
The Caño Cristales in Colombia, home to Macarenia clavigera, which turns the river bright colors in the rainy season. It has become a tourist attraction, but oil reserves nearby have pitted the government against a petroleum company.
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.
Nanomaterials arranged on a chip before being cut into their final forms at the SLAC National Accelerator Laboratory in Menlo Park, Calif.
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.”
Merino sheep on a farm in Alexandra, New Zealand. Scientists found that differences in the cells on a hair explain a sheep’s curls, and may offer insights for other mammals, like us.
New research suggests there is ice water up there, in craters at the poles where it’s dark and cold.
Neil Gershenfeld of the Massachusetts Institute of Technology says that synthetic biology, which involves the creation of biological systems intended for specific purposes, can generate scientific advances as well as ethical questions.
This robot, created by researchers in Singapore, took 20 minutes 19 seconds to make and execute a plan to assemble an Ikea chair.
A fossil of a cockroach dating to the Cretaceous period, about 145 to 65 million years ago. Insects took to the skies much earlier, but there is scant fossil evidence from the period showing how they evolved wings.
The ladder-shaped painting on the left in the La Pasiega cave in Spain is older than 64,000 years, scientists have found, and was made by Neanderthals.
The skeleton of Richard III.
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