Lionesses are better hunters than males and do most of the hunting for a pride.

Crocodiles swallow stones to help them dive deeper.

More germs are transferred shaking hands than kissing.

If an item moves very, very fast, it becomes smaller and heavier.

20/20 vision means the eye can see normally at 20 feet. 20/15 is better; the eye can see at 20 feet what another eye sees at 15 feet.

Lake Baikal in Russia contains more water than all the North American Great Lakes combined.

There is enough fuel in a full tank of a jumbo jet to drive an average car around the world four times.

The digits to the right of the Pi's (3.141...) decimal point can keep going forever, and there is no pattern to these digits at all.

Despite being closest to the sun, Mercury is not the hottest planet. The hottest planet is Venus (at 462 Celsius).

Due to its size, Pluto's moon Charon is also considered to be a double dwarf planet (two planets orbiting each other), rather than a moon orbiting its planet.