The thumbnail grows the slowest; the middle nail grows the fastest. See more

About 70 percent of your body weight is water. See more

Your muscles make up about one-half of your body weight. See more

We know more about the surface of the moon than we do about the bottom of the ocean. See more

10% of human dry weight comes from bacteria. See more

Astronaut Neil Armstrong first stepped on the moon with his left foot. See more

The heart beats about 100,000 times each day. See more

The electric chair was invented by a dentist. See more

Hydrogen is an explosive gas. Oxygen supports combustion. Yet when these are combined it is water which is used to put out fires. See more

Zero point energy is a source of energy which is released when atoms stop moving, at -273 Celcius. See more

Plants that are not cared for will cry for help, a thirsty plant will make a high-pitched sound that is too high for us to hear. See more

The highest publicly reported amount of money paid for a domain name is $7.5 million! Paid for business.com. See more

All the chemicals in the human body have a combined value of approximately £4.00. See more

Astronauts are not allowed to eat beans before they go into space because passing wind in a spacesuit damages them. See more

The first domain name ever registered was Symbolics.com. See more

Your skin weighs about 3.2 kg. See more