In zero gravity, a candle's flame is round and blue.
16
The use of emoticons affects our corresponding brain areas and can actually trigger emotions.
21
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
Brass doorknobs automatically disinfect themselves in about 8 hours.
18