Sloths, the world's slowest mammals, have evolved over 64 million years into a species that thrives throughout Central America and northern South America, but climate change and human sprawl could be ...

The apparent docility and friendliness of “smiling” sloths have made them tourist darlings, but have also put a target on their backs. The rise in trafficking of these animals led the governments of ...

Conservation biologist Rebecca Cliffe fits an accelerometer backpack to a wild three-fingered sloth to measure its movement. The Sloth Conservation Foundation, CC BY-NC-ND Sloths are more vulnerable ...