This is equal parts disgusting and hypnotic. We’ve seen hippos using their tails to spray their poop around, but we’ve only seen it on land—and the hippo wasn’t pressed right up against glass. Let’s ...

Hippos respond differently to the calls of familiar and unfamiliar hippos. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

Freelance writer Amanda C. Kooser covers gadgets and tech news with a twist for CNET. When not wallowing in weird gear and iPad apps for cats, she can be found tinkering with her 1956 DeSoto. When you ...