According to studies, men change their minds two to three times more often than women.
72
Indoor pollution is 10 times more toxic than outdoor pollution.
62
Sound at the right vibration can bore holes through a solid object.
134
A ball of glass will bounce higher than a ball made of rubber.
73
If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
Nearly 50% of the world's scientists are assigned to military projects.
71