4.5 pounds of sunlight strike the Earth each day.
27
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Columbia University has developed an artificial tree that passively soaks up carbon dioxide from the air using "leaves" that are 1,000 times more efficient than true leaves that use photosynthesis.
15
The bark of an older redwood tree is fireproof.
65
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
For a high school science fair project, 17-year-old Michio Kaku built a particle accelerator in his parent's garage that was able to generate a magnetic field 20,000 times greater than the Earth's and produce collisions powerful enough to create antimatter.
34
Pumice is the only rock that floats on water.
14