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A giant dioon, seen at the United States Botanic Garden, is part of the cycad family and can be found growing in Mexico and Central America.

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Maggie Starbard/NPR

A museum employee stands beneath a mastodon skeleton on display at the U.S. National Museum, now the Smithsonian National Museum of Natural History, circa 1917. A new study revisits an old debate about the evidence for an early mastodon hunt in North America.

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Smithsonian Institution Archives

What Slew An Ancient Mastodon? DNA Tells Tale

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Brain researchers say the big fluctuations in IQ performance they found in teens were not random — or a fluke.

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These skeletal remains exhumed from an old prison cemetery are now confirmed as the bones of outlaw legend Ned Kelly.

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Damien Plemming/Victorian Institute of Forensic Medicine

Bones Of Aussie Outlaw Legend Rise Again

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Video Pick: Space Eggs

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