In zero gravity, a candle's flame is round and blue.
16
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
Out of all the senses, smell is most closely linked to memory.
146
One 75-watt bulb gives more light than three 25-watt bulbs.
57
The earth is approx. 6,588,000,000,000,000,000 tons.
175
Each day, up to 150 species of life become extinct.
-23
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
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