If the chemical sodium is dropped into water it will immediately and violently explode.
67
Iron weighs more after it rusts.
16
The average temperature at 40,000 feet above sea level is -60 F.
56
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
The smell of freshly cut grass is actually a plant distress call.
31
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Most dust particles in your house come from dead skin.
48