John Tyler, the 10th president of the United States, was born in 1790. He has a grandson that is alive today.
The Crown Jewels contain the two biggest cut diamonds on Earth.
In 1945, Dwight D. Eisenhower predicted that people would try to dispel the holocaust as a falsehood, and ordered all possible photographs taken of the Nazi crimes to hinder any such attempts.
Great white sharks are so scared of killer whales that they'll avoid an area for up to a year after spotting one.