Sound travels about 4 times faster in water than in air.
408
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
The use of emoticons affects our corresponding brain areas and can actually trigger emotions.
21
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199