The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
The sun is 330,330 times larger than the earth.
75
Sound travels about 4 times faster in water than in air.
408
Pure water (H2O) does not conduct electricity on its own.
46
The use of emoticons affects our corresponding brain areas and can actually trigger emotions.
21
Balsa wood is classified as a hard wood!
41
Most dust particles in your house are made from dead skin!
67