A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
A cubic yard of air weighs about 2 pounds at sea level.
31
Sound travels fifteen times faster through steel than through air.
134
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39