Writer Katherine Rundell introduces the hippopotamus as part of her series exploring the lives of 20 astonishing and endangered creatures.

From lions and hippos to polar bears, discover the 10 most aggressive animals toward humans and learn what makes them so ...

Hippos survived in icy Europe far longer than thought, revealing surprising warmth and resilience during Ice Age.

Hippos, today restricted to sub-Saharan Africa, survived in central Europe far longer than previously assumed. Analyses of ...