The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
The force of a suction cup is calculated using F=AP.
15
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Out of all the senses, smell is most closely linked to memory.
146
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
German chemists made a replica of a trophy the size of one molecule.
68
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9