Defecating exposes sloths to predators on the jungle floor. An unexpected ally benefits, and returns the favor.

On several occasions, the cameras photographed a shaggy brown bear identified by researchers as an “extremely rare” leucistic sloth bear. Sloth bears are a vulnerable species found across India.

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.