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Evolution

New research suggests the ancestors of reptiles, birds and mammals might have walked more efficiently on land than previously thought.

Charles Q. Choi, Contributor

Long penises may allow hermit crabs to stay in their shells during sex, reducing the risk of shells being stolen.

Nala Rogers, Staff Writer

Two well-preserved fossils found in China were covered in both furlike pycnofibers and featherlike features.

Charles Q. Choi, Contributor

New research may explain why some cloven-hoofed animals have tusks instead of horns or antlers.

Nala Rogers, Staff Writer

Scientists delve deep into why and how the turkey -- that ends up on our plates -- turned out the way it is.

Emilie Lorditch, Staff Writer

Heat-tolerant prehistoric enzymes might help produce valuable chemicals and biofuels.

Catherine Meyers, Editor

Despite conservation efforts, close assessment of Pando reveals significant losses. 

James Gaines, Contributor

The smallest Diplodocus skull ever discovered reveals clues about the group's evolution.

Claire Cleveland, Contributor

The 2018 Nobel Prize in chemistry will go to Frances H. Arnold, George P. Smith and Sir Gregory P. Winter for research on enzymes, peptides and antibodies.

Benjamin Plackett, Contributor

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