Suzi Eszterhas (USA) captures an encounter between a sloth and a dog. The brown-throated sloth had already made it across a road, but to reach the next clump of trees it needed to return to the ground ...

To mark the BBC Radio 4 documentary The Power of Sloth, zoologist and author of Life in the Sloth Lane, Lucy Cooke, unleashes her inner sloth to discover why being lazy could actually be the ...