Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
The sun is 330,330 times larger than the earth.
75
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Hot water can freeze faster than cold water.
181
The smell of freshly cut grass is actually a plant distress call.
31
The use of emoticons affects our corresponding brain areas and can actually trigger emotions.
21
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Columbia University has developed an artificial tree that passively soaks up carbon dioxide from the air using "leaves" that are 1,000 times more efficient than true leaves that use photosynthesis.
15