The Red Sweat of Hippos by Yoko Saikawa et al.: Within a few minutes of perspiration, the colourless, viscous sweat of the hippopotamus gradually turns red, and then brown as the pigment polymerizes and may act as both an antibiotic and sunscreen. #Hippo #Sweat #Yoko_Saikawa
Do Hippos Sweat Blood? - Red Hippopotamus Sweat: The hippo mystified ancient Greeks because it appeared to sweat blood. Although hippos do sweat a red liquid, it isn't blood. The animals secrete a sticky liquid that acts as a sunscreen and topical antibiotic. Initially, hippo perspiration is colorless. As the viscous liquid polymerizes, it changes color to red and eventually brown. Droplets of perspiration resemble drops of blood, although hippo perspiration sticks to the animal's wet skin.
Did you know that hippos sweat red? Their sweat actually protects against sun damage and prevents the growth of bacteria on the skin. This properties probably evolved from the need to protect them from the harsh sunlight they spend their days in. It also helps to heal and prevent infection in wounds, which is useful in a species that fights as much as they do. Basically, they've evolved a colorful antibacterial sunscreen! Shutterfly | Science Is Awesome photo