African wild dogs use a sneeze-based voting system — the more sneezes during a pack meeting, the higher the chance the group agrees to go hunting.

In 1962, a 'laughing epidemic' in Tanganyika (now Tanzania) began with three schoolgirls and quickly spread, affecting over 1,000 people in the region and causing widespread disruption.

Cows have best friends. They form close friendships with specific companions and often prefer to spend time together; they can become stressed when separated from their friends.

In 1932, Australia declared war on its local emu population because they were eating crops. The emus won.

Sweat itself doesn't smell. It's the interaction with bacteria on your skin that causes body odour.

Philadelphia Cream Cheese was invented in New York in 1872. It was named 'Philadelphia' to capitalize on the city's reputation for quality dairy products, and has never been produced there.

Astronaut helmets have a patch of Velcro inside them for the sole purpose of enabling astronauts to scratch their noses.