People who have been blind from birth have dreams that are formed from their other senses (e.g., touch, smell, sound).

With very few exceptions (a few copper hatchets and spear heads in the Great Lakes region), the peoples of the Americas and the Pacific remained at the Neolithic level of technology, with no metal making ability, up until the time of European contact.

Takeru Kobayashi is the world's fastest eater. He is the top ranked eater in the world according to the 'International Federation of Competitive Eating'. He set his first record on July 4, 2001, when he ate 50 hot dogs in 12 minutes at the Nathan's Coney Island hot dog-eating contest, shattering the previous record of 25.5. The record was so unexpected that when Kobayashi got to the later numbers, the organizers ran out of signs indicating how many dogs Kobayashi had eaten and had to resort to handwritten signs. In 2002 he beat his previous record by one half of a hot dog, consuming 50.5 Nathan's famous hot dogs in 12 minutes. On July 4, 2004 he set a new record when he ate 53.5 in the same amount of time. Kobayashi has a condition called gastroptosis, an abnormal downward displacement of the stomach. It plays a role in his eating ability because his stomach is able to expand below the rib cage unlike most people, allowing him to take in large portions of food.

The first cause of cancer was identified by British surgeon Percivall Pott, who discovered in 1775 that cancer of the scrotum was a common disease among chimney sweeps.

Between 50 billion and 70 billion cells die each day due to apoptosis(a genetically determined process of cell self-destruction) in the average human adult. In a year, this amounts to the proliferation and subsequent destruction of a mass of cells equal to an individual's body weight.