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5-19-2019 py ii teeth wide df c bdb b ab f c ca a f

400,000-year-old teeth suggest Neanderthals and humans split much earlier than thought

USA Today | 
Our distant cousins just got a little more distant. A new study suggests that modern humans and our closest relatives, the Neanderthals, ...

Bad weather, habitat destruction and pesticides are main threats to monarch butterflies

USA Today | 
The number of monarch butterflies that overwintered in forests in Mexico fell for a second straight year, experts say. Monday's ...