Hippo Fact #3: To stay cool in the blistering African heat, hippos spend most of their day in rivers and lakes. Their eyes, nose and ears are located on the top of their head, which means they can see and breathe whilst submerged in the water. What’s more, these super-cool creatures sweat an oily red liquid which helps protect their skin from drying out – and acts as a sunblock, too! Cool, huh?