The Mexicans have a tradition of "pulgas vestidas". Fleas are dressed and painted to represent little people.
Ukelele means "dancing flea".
Men belonging to the Lundaya Murats tribe based in Borneo can be fined one pig if caught picking the fleas from the hair of a married woman.
The male flea sports an organ approximately 2.5 times the length of its own body — the largest, relative to its size, of any insect.
Fleas don't lay eggs until after their first blood meal. They begin to lay eggs (up to 50 per day) within 36-48 hours of that meal.
Some fleas can jump 150 times their own length. That's like a human jumping 1,000 feet.
Paper currency is covered with germs and may play a role in the transmission of potentially harmful organisms.
The inside of a man’s wallet is a great breeding ground for germs. It functions as an incubator.
Eating, touching, breathing... the average desk area in an office has 400 times more bacteria on it than the average toilet seat.
To leave a building via the elevator you'll have to press the 1st floor button. It's exceptionally dirty - great place to catch a cold germ.