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
If the chemical sodium is dropped into water it will immediately and violently explode.
67
Hot water can freeze faster than cold water.
181
The smell of freshly cut grass is actually a plant distress call.
31
Nearly 50% of the world's scientists are assigned to military projects.
71
In zero gravity, a candle's flame is round and blue.
16
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79