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Study suggests parts of the animals' backs and legs fused together to form wings.

Charles Q. Choi, Contributor

Wormlike amphibians called caecilians may have evolved venomous teeth long before the first snakes crawled the Earth.

Charles Q. Choi, Contributor

Close up image of rust-colored fox, taken from above, as the animal looks into the camera

Some evidence suggests that foxes may be trying to domesticate themselves.

Joel Shurkin, Contributor

Image shows a hand holding a piece of slate with a fossil, with mountains in the background.

New discovery could help scientists unearth more ancient microbial fossils and shed light on some big questions about early life on Earth.

Meredith Fore, Contributor

Hummingbirds can distinguish blends of color that we see as ordinary hues.

Charles Q. Choi, Contributor

Many dinosaurs gathered together in a scene showing predators, prey and scavengers

Prehistoric remains also reveal signs of a particularly large predator.

Joshua Learn, Contributor

A mysterious video shows worms fighting and dancing the "jitterbug."

Nala Rogers, Staff Writer

Bacteria engineered to glow green are helping to show how damage from aging is passed down through generations.

Nala Rogers, Staff Writer

Ethereal comb jelly floating in water

When times get tough, an invasive comb jelly appears to make the strange evolutionary choice to cannibalize its young.

Katharine Gammon, Contributor

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