The Plantaris is a small muscle in your calf that is believed to be used by our ancestors to grip with their feet. It is so weak that it is considered functionally obsolete and arguments have been made that humans are evolving it out. It is absent in 7-10% of the population worldwide.
The average height of a human being stayed constant from the stone age all the way until the 1800’s, yet the average human today is four inches taller on average than 150 years ago.
You have a ‘second brain’ embedded in the wall of your gut which controls digestion and has five times more neurons than a rat’s brain.
‘Old person smell’ is actually caused by the chemical 2-nonenal. Older people secrete this chemical through their skin at a much higher rate than younger people.
There is a group of Pacific Islanders that have adapted to override their body’s pupil dilation in low light. It gives them immense clarity of sight underwater and the children develop it at a very early age.
The tailbone, the appendix, and ‘goose bumps’ are all examples of human vestigiality, or traits that occur in humans which have lost their function through evolution. The tailbone is the remnant of a lost tail, the appendix was used for digestive purposes, and ‘Goose Bumps’ would flare body hair as a defense mechanism or to keep warm.
In an emergency coconut water can be used as a blood plasma.
You glow in the dark! Too weak to see, human bioluminescent emissions vary by time of day.
A man was brought to the emergency room with a BAC of 0.37% though he claimed to have not consumed any alcohol all day. Yeast in his stomach was brewing alcohol out of the food he was eating.
The scent given off by each person’s unique immune system is the second-most important criteria (after disposition) women use to assess potential partners. Women are more likely to find people attractive who have with immune systems unlike their own.