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ocellated lizard

SPECKLED SKIN  The green and black spots on the back of an ocellated lizard are arranged according to the rules of a cellular automaton, a concept from computer science. Scales flip colors depending on the colors of their neighbors.

proton illustration

PROTON PUZZLES  Hidden secrets of the humble particle could have physicists rethinking some standard notions about matter and the universe.

mastodon bones

HERE FIRST  An unidentified Homo species pounded apart mastodon bones with large stones in southern California around 130,700 years ago, a controversial study concludes. Finds at what’s proposed as the oldest archaeological site in the Americas include this mastodon leg bone with a notch possibly produced by a pounding stone.

fish

SEA OF HURT  A venomous reef stonefish (Synanceia verrucosa) is camouflaged as a rock in the Indian Ocean. Stings from the spines of this species are very painful.



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