A Chinese giant salamander, in a glass enclosure in Zhangjiajie, China. There are as many as eight distinct species, but farming is muddling them into a single hybridized population.
Caribou from the Dolphin and Union population during a crossing to the Canadian mainland.
Juul is under federal investigation for marketing its discreet, flash-drive-resembling e-cigarette product to youth.
The view from the summit of "Mount Thoreau" looking south toward the Palisades and the Northern boundary of Kings Canyon National Park.
Embryonic stem cells surrounded by feeder cells. When a team of scientists tried using Crispr to turn stem cells into neurons, they found that many of them died unless a cancer-fighting gene also was deactivated.
S. Alan Stern, center, New Horizons’ principal investigator, surrounded by children at Johns Hopkins University Applied Physics Laboratory in Laurel, Md., on Tuesday.
Participants in a study of the effects of ovulation were shown these two photos and asked which woman would be more likely to entice a dating partner.
Dr. Odile Madden, of the Getty Conservation Institute in Los Angeles, holding a piece of degrading plastic for use in trying out new methods of preservation.
Carl Hart, an associate professor at Columbia University, is the author of the book “High Price,” a mix of memoir and scientific research about drug addiction.
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.
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.
Humpback whales in the southern oceans around Antarctica appear to be breeding successfully, recovering their population.
A bee’s sting won’t hurt an elephant’s tough hide, but bees can swarm and wound more sensitive places like the trunk, eyes and mouth.
Jon Pace is the discoverer of the largest known prime number, 23.2 million digits long.
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.”
NASA’s Galileo spacecraft appears to have flown through a plume erupting from Jupiter’s moon Europa more than 20 years ago.
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