Number 10 – Humans evolved to lose almost every hair on their body…. except pubic hair. This could be to keep our genitals warm or even to reduce friction during sex.
Number 9 – 1 in 100 people have autism which causes social and language problems. It might be links to abnormally fast brain growth in childhood & and parts of the brain becoming easily overstimulated.
Number 8 – Science can’t answer why 70% of people experience sudden twitched before sleep. These muscle contractions could be an ancient reflex to signal that a sleeping primate is falling out of a tree.
Number 7 – A woman might realize she is pregnant just by developing a heightened sense of smell. This pregnancy superpower is rumored to stop women inhaling dangerous fumes that might damage their baby.
Number 6 – There is a mysterious genetic life form which cannot be classified as animal, bacteria or virus. It comprises 95% of the human genome & we have no idea what it is.
Number 5 – Unlike other mammals , women’s breasts are permanently enlarged even when they’re not breast-feeding. Some scientists think big breasts mimic the swollen buttocks of our fertile monkey ancestors.
Number 4 – Nobody knows why only 10% of the world’s population is left-handed. ‘Lefties’ could be survivors of ‘vanishing twin’ syndrome, outliving their mirror image sibling in the embryonic stage of pregnancy.
Number 3 – 1/3 of people sneeze when they look at bright lights and we’re not really sure why. Scientists suspect a neurological mix-up between light stimuli & the sneezing reflex … they call it ACHOO syndrome.
Number 2 – 25% of every night’s sleep is spent dreaming and we don’t have a clue why. Psychologist Freud thought dreams symbolized sexual desires, whereas modern scientists tend to think they help us solve problems through metaphorical thought.
Number 1 – Yawns have been studied for over 2,500 years and they’ve been linked to everything from primitive communication to sexual arousal. Some antibiotics have even been known to cause people to orgasm when they yawn.