Earth's atmosphere is, proportionally, thinner than the skin of an apple. Before 1863, postal service in the United States was free. Benjamin Franklin was the first head of the United States Post Office. David Rice Atchinson was President of the United States for exactly one day. Lyndon B. Johnson was the first president of the United States to wear contact lenses.
More people speak English in China than the United States.
The exact geographic center of the United States is near Lebanon, Kansas. All of the cobble stones that used to line the streets in New York were originally weighting stones put in the hulls of Belgian ships to keep an even keel. Fur seals get miserably sick when they're carried aboard ships. The son of the gun was one born in the ship often near the midship gun, behind canvas screen. If the paternity was uncertain, the child was entered in the log as son of a gun.