1) Bee hummingbirds are the smallest birds in the world. They are only 5 cm long.
2) Cheetahs are the fastest land animals in the world. Their top speed is about 95 km.
3) Antarctica is the windiest place on the planet. The wind can blow at 325 km per hour.
4) Mosquitoes are the most dangerous insects in the world because they can give people malaria.
5) The oldest tree in the world is in California. It's more than 5,000 years old.