Indoor pollution is 10 times more toxic than outdoor pollution.
62
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
One cubic foot of gold weighs more than 1,200 pounds!
78
4.5 pounds of sunlight strike the Earth each day.
27
One 75-watt bulb gives more light than three 25-watt bulbs.
57
The Manchineel Tree is so poisonous, rainwater dripping off it’s leaves will burn your skin.
17
Your brain is 80% water.
525