1) The word "school" contains two vowels: O and O.

2) Sloths only poop once a week, and when they do, they lose about one-third of their body weight.

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

4) The ozone layer, located in the Earth's stratosphere, protects us from harmful ultraviolet (UV) radiation.