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
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Iron weighs more after it rusts.
68
MIT has developed a camera that captures the speed of light at a trillion frames per second.
20
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
No matter how cold it gets, gasoline will not freeze.
107
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
The storage capacity of human brain exceeds 4 Terrabytes.
140