Iron weighs more after it rusts.
68
Sound travels fifteen times faster through steel than through air.
134
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
One third of the electricity produced on earth is used to power electric light bulbs!
75
The sun is 330,330 times larger than the earth.
75
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117
If the chemical sodium is dropped into water it will immediately and violently explode.
67