Many sharks lay eggs, but hammerheads give birth to live babies that look like very small duplicates of their parents. Young hammerheads are usually born headfirst, with the tip of their hammer-shaped head folded backward to make them more streamlined for birth.

Actor Tommy Lee Jones and former vice-president Al Gore were freshman roommates at Harvard.

A raisin dropped in a glass of fresh champagne will bounce up and down continuously from the bottom of the glass to the top.

The first full moon to occur on the winter solstice, Dec. 22, commonly called the first day of winter, happened in 1999. Since a full moon on the winter solstice occurred in conjunction with a lunar perigee (point in the moon's orbit that is closest to Earth), the moon appeared about 14% larger than it does at apogee (the point in it's elliptical orbit that is farthest from the Earth).

Cats sleep up to eighteen hours a day, but never quite as deep as humans. Instead, they fall asleep quickly and wake up intermittently to check to see if their environment is still safe. (Funny our cats only wake up when they smell food)

Dr. Samuel A. Mudd was the physician who set the leg of Lincoln's assassin John Wilkes Booth... and whose shame created the expression for ignominy, "His name is Mudd."