(and 24 other facts you should probably know).
(And 22 other facts you should probably know.)
Years it took for the human population to grow from 1 billion to 2 billion: 123. Years it took to grow from 6 billion to 7 billion: 12
Miles flown by a bar-tailed godwit in the longest nonstop bird migration ever recorded: 7,200. Miles flown in the world’s longest nonstop, non-refueled helicopter flight: 2,213.