Icebergs near Greenland's glaciers, which are speeding up as the climate warms.
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.
A healthy variable harlequin frog with golden coloring in the streams of Panama.
Scientists found that the tough exteriors of cockroaches help them keep moving without losing much momentum when they bump into things.
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.
Elan Ohayon and his wife, Ann Lam, who is holding their daughter, at a meeting with student researchers at the Green Neuroscience Laboratory.
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.
Musk oxen, massive mammals that live on Arctic tundra, are seeing their numbers dwindle as warmer, rainier winters limit access to food, researchers report.
The large Whirlpool Galaxy, left, is known for its sharply defined spiral arms.
A nearly 9-foot slab of rock found in a parking lot on the grounds of NASA’s Goddard Spaceflight Center holds the fossilized tracks of several dinosaurs and even a few early mammals.
A change encounter with the colors of a squid.
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.
An Oriental fire-bellied toad, which was imported into Europe from South Korea.
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.
A view of the asteroid Ryugu captured by the Hayabusa2 spacecraft on Sunday, from a distance of about 40 kilometers.
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