Snakes have two sex organs. See more

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

In the last 4000 years, no new animals have been domesticated. See more

Dolphins have bigger brains than the brains of humans See more

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

A bird "chews" with its stomach. See more

25% of all fires of unknown origin are rat-caused. 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