“Age had caught up with him. His hind legs were weak. The quality of his sperm was poor. And … the odds dimmed that he would mate successfully.” From WaPo: How has the fate of an entire subspecies of rhinoceros been left to one elderly male?

+ “No matter the personal variables, however, people reported feeling more energetic, more happy and less stressed after watching a video of a cat.” Caitlin Dewey on the fascinating, feel-good psychology of Internet cat videos. And related: These are the animals that are most likely to kill you this summer.

+ Fusion: Zookeepers are posting pictures of themselves ‘Prattkeeping,’ inspired by Jurassic World.