Caught right-handed: Mystery of coiling snake embryos explained

An international team led by Canadian researchers has found evidence explaining why snake embryos form a curious spiral. This ability to coil as embryos enables snakes to hatch with the longest bodies of all vertebrates.

Q&A: What dinosaur teeth reveal about diet and evolution

What did dinosaurs eat? Teeth provide important clues to understanding the ecology of dinosaurs, which became extinct approximately 66 million years ago. Their shape, structure and patterns of wear can help scientists reconstruct ...

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