Cold water weighs more than hot water.
93
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
The sun is 330,330 times larger than the earth.
75
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
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Most dust particles in your house are made from dead skin!
67
The average home creates more pollution than does the average car.
33
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118