1) The world's largest flower is the Rafflesia arnoldii, which can grow up to 3 feet (1 meter) in diameter and weighs about 15 pounds (7 kilograms).

2) The fingerprints of koalas are so similar to humans that they have been mistaken at crime scenes.

3) The Olympic motto is "Citius, Altius, Fortius," which is Latin for "Faster, Higher, Stronger."

4) Mount Kilimanjaro in Tanzania is the highest mountain in Africa and attracts climbers from around the world.