Eyes of rock let chitons see predators

Using eyes made of a calcium carbonate crystal, a simple mollusk may have evolved enough vision to spot potential predators, scientists say.

Oldest US natural history museum offers rare peek

(AP) -- The Academy of Natural Sciences has never been one to brag. Its 225,000 annual visitors may associate the nation's oldest natural history museum solely with dioramas and dinosaurs, but behind the scenes there is ...

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