One 75-watt bulb gives more light than three 25-watt bulbs.
57
Iron weighs more after it rusts.
68
Sound travels about 4 times faster in water than in air.
408
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9
Scientists are attempting to create a synthetic brain by reverse-engineering the mammalian brain down to the molecular level. A cellular human brain is predicted possible by 2023. It hopes to shed light on consciousness.
10
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
The average temperature at 40,000 feet above sea level is -60 F.
56
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101