The smell of freshly cut grass is actually a plant distress call.
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During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
21
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
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
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
Most dust particles in your house are made from dead skin!
67
Most dust particles in your house come from dead skin.
48
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5