The ozone layer averages about 3 millimeters (1/8 inch) thick.
A crocodile cannot stick out its tongue. (Imagine what that would have looked like…)
There are two words in the English language that have all five vowels in order: “abstemious” and “facetious.”
Tigers have striped skin, not just striped fur.
TYPEWRITER is the longest word that can be made using the letters only on one row of the keyboard.