The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
The sun is 330,330 times larger than the earth.
75
One barrel of petroleum holds 42 gallons.
20
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
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
The smell of freshly cut grass is actually a plant distress call.
31
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17
In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
39