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

2) A newborn kangaroo is about 1 inch (2.5 centimeters) long and weighs less than a gram.

3) The first computer mouse was invented by Douglas Engelbart in 1964 and consisted of a wooden shell and two metal wheels.

4) The destructive power of cyclones is often attributed to their storm surge, which is a rise in sea level caused by the strong winds and low atmospheric pressure.