Sloths are famous for moving slowly, but that extreme pace has unexpected biological consequences. Because they spend so much time nearly motionless, algae can grow directly in their fur, turning the ...

"Sloth cell lines may offer a natural model for understanding how organisms cope with low-energy states." ...

Deep within tropical forests, sloths move at a pace that seems almost frozen in time. Their slow movements, low energy use, and quiet lives have long puzzled scientists.