When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
One third of the electricity produced on earth is used to power electric light bulbs!
75
A ball of glass will bounce higher than a ball made of rubber.
73
The storage capacity of human brain exceeds 4 Terrabytes.
140
Scientists have developed a microparticle filled with oxygen that can be injected into the blood stream, enabling us to live without breathing.
21
Aluminum used to be more valuable than gold!
84
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
Pumice is the only rock that floats on water.
14