Sound travels about 4 times faster in water than in air.
408
Sound travels fifteen times faster through steel than through air.
134
Out of all the senses, smell is most closely linked to memory.
146
The average home creates more pollution than does the average car.
33
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
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
Rafflesia Arnoldii is the largest flower in the world and can grow as big as an umbrella.
42