Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Galalith is a type of plastic that can be made from milk. It is odourless, insoluble in water, biodegradable, anti-allergenic, antistatic, and virtually non-flammable.
1
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
Sound travels fifteen times faster through steel than through air.
134
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
A cesium atom in an atomic clock beats over nine billion times a second.
43
MIT has developed a camera that captures the speed of light at a trillion frames per second.
20