Did you know that Rats multiply so quickly that in 18 months, two rats could have over 1 million descendents?

The embryos of tiger sharks fight each other while in their mother's womb, the survivor being the baby shark that is born.

Ants do not sleep.

Nearly a third of all bottled drinking water purchased in the US is contaminated with bacteria.

Rats multiply so quickly that in 18 months, two rats could have over 1 million descendents.

An Astronaut can be up to 2 inches taller returning from space. The cartilage disks in the spine expand in the absence of gravity.