The Earth lost 40% of its wildlife in the past 40 years, according to the WWF.
Before trees were common, the Earth was covered with giant mushrooms.
A newborn baby has one cup of blood in his body.
41 new species are discovered by scientists every single day.
Stomach acid is strong enough to dissolve razor blades.
The Earth is a giant magnet.
Polar bears are nearly undetectable by infrared cameras.
In 2.3 billion years it will be too hot for life to exist on Earth.