An image captured from NASA TV showing astronaut Mike Hopkins during a spacewalk outside the Ineternational Space Station.
A colored transmission electron micrograph of a human serous cell’s nucleus, with its nucleolus in purple. The nucleolus functions as the sort of brain of the nucleus, making rRNA, a basic ingredient for making proteins.
Microscopic tubular structures found within red garnets may be caused by the burrowing of microorganisms.
The skeleton of Richard III.
A change encounter with the colors of a squid.
Viruses attached to a fragment of a bacterial cell wall. “Viruses modulate the function and evolution of all living things,” scientists wrote last year. “But to what extent remains a mystery.”
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.
Pit Bull: The Battle Over an American Icon by Bronwen Dickey
Over the past 17 years, the numbers of some bird species in French farming regions have dropped considerably. Meadow pipits have declined by 68 percent.
This robot, created by researchers in Singapore, took 20 minutes 19 seconds to make and execute a plan to assemble an Ikea chair.
Contrails from the launch of a Falcon 9 rocket from SpaceX on Dec. 22 in Apple Valley, Calif.
Radar images of a near-Earth asteroid collected in 2015. Since 2011, a NASA project called Neowise has studied 158,000 asteroids. But Microsoft’s former chief technologist, Dr. Nathan P. Myhrvold, criticized those numbers. “The science is terrible,” he said.
A piece of plastic polymer about to be destroyed under ultraviolet light.
Researchers at the University of Glasgow studied physiological indicators of stress in clown fish living with bleached anemones, a result of warming temperatures and other environmental disturbances.
Is the pleasure of enjoying a Leonardo da Vinci painting really any different than the pleasure we get from eating chocolate?
Earth’s gravitational interactions with other planets — particularly Venus, because it is very near — affect the shape of its orbit.
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