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.
An arctic fox near Helagsfjället mountain in Sweden. Foxes in the area were severely inbred until three males from a Norwegian captive breeding population turned up.
Zhong Zhong, one of two cloned monkeys at the Chinese Academy of Sciences in Shanghai. They are the first primates cloned by transferring DNA into fetal cells.
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.
An abandoned car along the Amargosa River Trail, which runs between Death Valley and the Mojave Desert in California.
A thermal image of elephants, part of an effort to apply tools from astronomy to help conservationists and fight poaching.
The United States Navy's laser weapon. It can be used to ablate, ignite or otherwise damage an air or sea target.
Marco Zozaya in March near his home in Mexico. He aspires to be a science communicator like Neil deGrasse Tyson, but faces the conundrum of internet audiences and algorithms that may prefer drama over scientific information.
A transparent hatchetfish, retrieved by researchers from the Woods Hole Oceanographic Institution, which is seeking to understand better the creatures that occupy the sea from 600 to 3,300 feet deep.
Almost 230 feet tall and weighing more than 3 million pounds, the Falcon Heavy is more powerful than any other rocket flying today.
Jo-Wilfried Tsonga of France wiped sweat from his face during the Australian Open. Researchers say their new wearable sensor can measure perspiration for conditions like dehydration and fatigue.
Elephants, like their forebears mastodons and mammoths, carry a unique gene whose proteins kill off potentially cancerous cells.
An assortment of zebra finches studied by Sarah Woolley, a neuroscientist at Columbia University. Dr. Woolley found that finches were expert at learning the songs of their fathers for later in life, when it comes time to find a mate.
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.
Eclipse-watchers on Nye Beach in Newport, Ore., on Aug. 21.
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