Nylon is made from coal and petroleum.
42
The smell of freshly cut grass is actually a plant distress call.
31
Billions of neutrinos pass unnoticed through your body every second.
6
Sound travels about 4 times faster in water than in air.
408
The storage capacity of human brain exceeds 4 Terrabytes.
140
The average home creates more pollution than does the average car.
33
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39