News

Smithsonian Magazine22h
Giant Sloths the Size of Elephants Once Walked Along the Ground. Here’s How the Massive Animals Evolved and Declined
Researchers analyzed fossils and DNA to get a big-picture view of sloth evolution and determine what drove their immense size ...
Science News6d
Sloths once came in a dizzying array of sizes. Here’s why
A new fossil and DNA analysis traces how dozens of sloth species responded to climate shifts and humans. Just two small tree-dwelling sloths remain today.