One barrel of petroleum holds 42 gallons.
20
Pumice is the only rock that floats on water.
14
Out of all the senses, smell is most closely linked to memory.
146
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
The idea of left brain (logical) and right brain (creative) has no basis in neuroscience and is in fact a myth.
16
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