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Life & Evolution

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leaf-cutter ants

STAY DRY  When the rain starts falling in Central America’s tropical forests, leaf-cutter ants (Atta cephalotes) hurry back to their nests — with or without their leafy cargo, which gets heftier when wet. 

amber

ARRESTED IN AMBER  Chunks of amber contain fossils of 99-million-year-old frogs that were roughly the size of a postage stamp. One chunk (left) holds a recognizably froggy leg and body. Another specimen (right) contains a juvenile with a partial skull.

researchers with a narwhal

TURN IT UP  Researchers put an acoustic tagging device on a male narwhal to record its underwater clicks, buzzes and calls.  

Life & Evolution

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