Mastodons took frequent trips north when climate changed

New research suggests that American mastodons were avid travelers, migrating vast distances across North America in response to dramatic climate change during the ice ages of the Pleistocene. The study, conducted by an international ...

New research shakes up the sloth family tree

New studies by two research teams published today in the journals Nature Ecology and Evolution and Current Biology challenge decades of accepted scientific opinion concerning the evolutionary relationships of tree sloths ...

Sloth movement secrets revealed

(PhysOrg.com) -- New studies of the movements of sloths have revealed more information about how they move around in the trees, traveling upside down.

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