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
Most dust particles in your house come from dead skin.
48
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Billions of neutrinos pass unnoticed through your body every second.
6
No matter how cold it gets, gasoline will not freeze.
107
