Iron weighs more after it rusts.
68
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
Pure water (H2O) does not conduct electricity on its own.
46
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
MIT has developed a camera that captures the speed of light at a trillion frames per second.
20
During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
21
Dr.Jonas Salk, the man who came up with the cure for polio, didn’t patent the drug. This made the drug more affordable to the general public, and he lost out an an estimated $7 billion dollars for himself.
41
4.5 pounds of sunlight strike the Earth each day.
27