SLOTHS: THE RELATIVES WHO WENT TO SEA

We tend to picture sloths hanging quietly in a tree, looking as though their next appointment is sometime on Thursday.Their fossil relatives had other plans. Some went into the ocean.Meet Thalassocnus, a group of extinct sloths that lived along the Pacific coast of South America roughly nine to five million years ago. Fossils from Peru and Chile reveal animals that increasingly adapted to feeding

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