Iron weighs more after it rusts.
68
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
All Humans Are 99.9% Genetically Identical and 98.4% of human genes are the same as the genes of a chimpanzee.
51
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65