The smell of freshly cut grass is actually a plant distress call.
31
Dogs can be trained to identify the scent of lung cancer long before symptoms develop.
190
Sitting straight upright in your chair is bad for your back. You should instead slouch at an angle of 135 degrees.
10
Touching a teddy bear can make people feel less lonely.
36
The United States does not have an official language.
88
Chocolate is lower in caffeine than tea, coffee and coca cola. A one ounce bar of chocolate contains about 6mg of caffeine, whereas a five ounce cup of regular coffee contains over 40mg.
114
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