After Hitler ordered the deportation of Denmark's Jewish population, Danish citizens organized a massive evacuation of the Jews to neutral Sweden, despite the risks. In the end, 99% of Danish Jews survived the Holocaust.
Your brain is sometimes more active when you're asleep than when you're awake.
The odds of getting a royal flush are exactly 1 in 649,740.
Before mating, the female giraffe will first urinate in the male's mouth.