But what does it do?
Scientists still aren't sure why early humans had such weird skulls—or why we don't.
Evolution is too complicated to plot out like a family tree.
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Who owns the bones?
The eyewear can help us understand the puffin perspective.
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Instead of storing carbon, researchers want to convert it into fuel.
The aviation industry is on the verge of a major shift in propulsion, experts say.
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