Brass doorknobs automatically disinfect themselves in about 8 hours.
18
German chemists made a replica of a trophy the size of one molecule.
68
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
The smell of freshly cut grass is actually a plant distress call.
31
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Oak trees produce 2,200 acorns in a season, but each acorn only has a 1 in 10,000 chance of becoming an oak tree.
304
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116