Pumice is the only rock that floats on water.
14
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Nylon is made from coal and petroleum.
42
Out of all the senses, smell is most closely linked to memory.
146
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
For a high school science fair project, 17-year-old Michio Kaku built a particle accelerator in his parent's garage that was able to generate a magnetic field 20,000 times greater than the Earth's and produce collisions powerful enough to create antimatter.
34
Balsa wood is classified as a hard wood!
41