When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
If you yelled for 8 years, 7 months and 6 days, you would have produced enough sound energy to heat one cup of coffee.
Donkeys kill more people annually than plane crashes.
In Hong Kong, a betrayed wife is legally allowed to kill her adulterous husband, but may only do so with her bare hands. (The husband's lover, on the other hand, may be killed in any manner desired.)
Your fingernails grow faster in summer.