Iron weighs more after it rusts.
16
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9
One cubic foot of gold weighs more than 1,200 pounds!
78
The inventor of the Super Soaker squirt gun was a NASA Scientist who also helped develop the Stealth Bomber and the Galileo mission to Jupiter.
7
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
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
One ragweed plant can release as many as one billion grains of pollen!
51
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0