The smell of freshly cut grass is actually a plant distress call.
31
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Your brain is 80% water.
525
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
Sound at the right vibration can bore holes through a solid object.
134
Nylon is made from coal and petroleum.
42
Most dust particles in your house come from dead skin.
48