Now you Know

Sharks are immune to cancer.

Despite the hump, a camels spine is straight.

Cheetah's can accelerate from 0 to 70 km/h in 3 seconds.

A giraffe's neck contains the same number of vertebrae as a human.

The heart of giraffe is two feet long, and can weigh as much as twenty four pounds.

On average, elephants sleep for about 2 hours per day.

Lobsters have blue blood.

Shark's teeth are literally as hard as steel.

A mosquito has 47 teeth.

Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.

Seventy percent of the dust in your home consists of shed human skin.

Fish are the only vertebrates that outnumber birds.

A cockroach can live for several weeks without its head.

The average human produces a quart of saliva a day -- about 10,000 gallons in a lifetime.

Elephants have been known to remain standing after they die.

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.

Fact
When Einstein was inducted as an American, he attended the ceremony without socks .. More >>