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Evolution

Researchers found a "ghost population" that interbred with the ancestors of modern humans.

Charles Q. Choi, Contributor

309 million years ago an animal that resembled a lizard wrapped its tail around a younger member of its species.

Charles Q. Choi, Contributor

The bigger the whale, the tougher it is to find a decent meal.

Joshua Learn, Contributor

The water contains bacterialike shapes that researchers plan to test for DNA.

Nala Rogers, Staff Writer

The parasites were found on preserved dinosaur feathers from almost 100 million years ago.

Charles Q. Choi, Contributor

Damselfish often end up raising young that aren't their own.

Amanda Heidt, Contributor

A new study shows that the Inuit brought dogs with them when settling North America, and these dogs’ descendants are still working today.

Katharine Gammon, Contributor

Cowbirds outsource parenting to other species, but an innate password tells their children to copy cowbird songs.

Nala Rogers, Staff Writer

Plants may recruit defenders by bribing them with other plants' pollen.

Nala Rogers, Staff Writer

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