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| An embryo of a few weeks |
42. A human head remains conscious for about 15 to 20 seconds after it has been decapitated.
43. Humans can make do longer without food than sleep. Provided there is water, the average human could survive a month to two months without food depending on their body fat and other factors. Sleep deprived people, however, start experiencing radical personality and psychological changes after only a few sleepless days. The longest recorded time anyone has ever gone without sleep is 11 days, at the end of which the experimenter was awake, but stumbled over words, hallucinated and frequently forgot what he was doing.
44. The most common blood type in the world is Type O. The rarest blood type, A-H or Bombay blood, due to the location of its discovery, has been found in less than hundred people since it was discovered
45. Every human spent about half an hour after being conceived, as a single cell. Shortly afterward, the cells begin rapidly dividing and begin forming the components of a tiny embryo.
46. Right-handed people live, on average, nine years longer than left-handed people do.
47. Your ears secrete more earwax when you are afraid than when you aren't.
48. Koalas and primates are the only animals with unique fingerprints.
49. Humans are the only animals to produce emotional tears.
50. The human heart creates enough pressure to squirt blood 30 feet in the air.
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