Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Out of all the senses, smell is most closely linked to memory.
146
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
Rafflesia Arnoldii is the largest flower in the world and can grow as big as an umbrella.
42
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199