1) The average person spends around six months of their lifetime waiting for red lights to turn green.

2) The shortest scheduled commercial flight lasts just 1.7 miles and connects two Scottish islands, Westray and Papa Westray.

3) The world's largest volcano, Mauna Loa in Hawaii, is also one of the most active.

4) The concept of gravity was famously described by Sir Isaac Newton after an apple fell on his head.