Leonardo Da Vinci predicted the mass use of solar energy as long ago as 1447.
The human brain uses approximately as much energy as a 10 watt light bulb.
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
If you yelled for 8 years, 7 months and 6 days, you would have produced enough sound energy to heat one cup of coffee.
The United States consumes 25% of all the world's energy.