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Tiny brainlike cell cultures called organoids offer clues about human evolution.

Nala Rogers, Staff Writer

Sponges, one of the most ancient animal lineages, can maintain normal gene activity even as oxygen levels drop.

Nala Rogers, Staff Writer

The image shows a dense forest, interspersed with a river and islands.

Expeditions in remote Amazon waterways result in identification of two previously unknown electrified fish.

Joshua Learn, Contributor

Ancient flying reptile dubbed Cryodrakon boreas, the "cold dragon of the north winds," may shed light on the evolution of these dinosaur relatives.

Charles Q. Choi, Contributor

A Komodo dragon still, with a deer in the background.

Komodo dragons outlived their giant reptile peers through isolation and some lucky breaks, although cannibalism and virgin births may have helped.

Joshua Learn, Contributor

Researchers find that membranes may have helped the building blocks of life come together.

Sofie Bates, Contributor

Microbiologists are debating how a group of ancient microbes fits into the emergence of the first complex organisms.

Valerie Brown, Contributor

They have multiple copies of a gene that causes mutated cells to commit suicide.

Nala Rogers, Staff Writer

Decades of observation and research suggest zebras may use their stripes for temperature regulation, among other functions.

Joshua Learn, Contributor

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