The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
The use of emoticons affects our corresponding brain areas and can actually trigger emotions.
21
According to studies, men change their minds two to three times more often than women.
72
A cubic yard of air weighs about 2 pounds at sea level.
31
The only letter not appearing on the Periodic Table is the letter "J".
180
Your brain is 80% water.
525
The smell of freshly cut grass is actually a plant distress call.
31