The earth is approx. 6,588,000,000,000,000,000 tons.
175
Balsa wood is classified as a hard wood!
41
Most dust particles in your house come from dead skin.
48
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Your brain is 80% water.
525
If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117
Cold water weighs more than hot water.
93