Iron weighs more after it rusts.
68
The bark of an older redwood tree is fireproof.
65
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
The smell of freshly cut grass is actually a plant distress call.
31
If the chemical sodium is dropped into water it will immediately and violently explode.
67
Nuclear power prevented an average of over 1.8 million deaths between 1971-2009 as a result of lower air pollution from reduced coal usage according to NASA.
5
A cesium atom in an atomic clock beats over nine billion times a second.
43
Iron weighs more after it rusts.
16