It’s possible to replace a lost thumb with a toe. The first successful toe-to-thumb transplant was performed in 1964, on a rhesus monkey (the first human was 1972).
27. There is a condition called ‘dactylolysis spontanea’, where a person’s toe just randomly falls off, and doctors have no idea why it happens.
28. When you give a thumbs up, the divot at the base of your thumb and wrist is called a “snuff box” ( anatomical snuffbox is the actual medical term).
29. Pain signals sent by an irritated diaphragm will be felt in the shoulder. The stabbing sensations near the heart that are sometimes felt after consuming a fatty meal are often confused with heart attacks but are nothing more than symptoms of indigestion.
30. Humans are unlikely to sink entirely into quicksand due to the higher density of the fluid. Quicksand has a density of about 2 grams per milliliter, while human density is only about 1 gram per milliliter. A human would descend up to their waist, but no further.
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The human genome is comprised of 5% - 8% viral DNA, which can be traced back to 30-35 separate viral invasions in human history.
32. Only one person is recorded to have been cured of HIV/AIDS. In 2006, a patient from Berlin received a stem-cell transplant from an HIV-resistant donor, in-part to treat his Leukemia. He has been HIV-free since then.
33. When people are electrocuted and thrown far distances, it is a result of sudden and violent muscle contraction and not the result of the shock. This has raised questions as to the actual strength and capabilities of the muscles in the human body.
34. In 2004, a rapist fooled DNA tests by surgically implanting a tube filled with blood in his arm and tricking the laboratory technician into having a blood sample taken from it.
35. Paper cuts hurt so badly because paper does more microscopic damage to the skin, and there often isn't blood to protect nerves afterward.
The human cornea extracts oxygen directly from the air. It has no blood supply.
37. Pus is just white blood cells that died fighting off infection.
38. There is about 0.2 milligrams of gold in our bodies, most of which is in our blood.
39. Cornstarch (a common thickening agent in foods), will spike your blood sugar level faster than pure sugar.
40. It has been suggested online that the drug Cabergoline has a possible recreational use in reducing or eliminating the male refractory period, thereby allowing men to experience multiple ejaculatory orgasms in rapid succession by inhibiting the hormone prolactin and at least one scientific study supports those speculations.
41Falling in Love
Recent studies in neuroscience have indicated that as people fall in love, the brain consistently releases a certain set of chemicals, including the neurotransmitter hormones, dopamine, norepinephrine, and serotonin, the same compounds released by amphetamine, stimulating the brain's pleasure center and leading to side effects such as increased heart rate, loss of appetite and sleep, and an intense feeling of excitement. Research has indicated that this stage generally lasts from one and a half to three years.
42. The National Institute of Environmental Health Sciences has estrogen in its list of known cancer-causing agents. Estrogen is a natural hormone circulating in significant amounts through the bodies of half the world's population.
43. There is a positive correlation between vitamin D and testosterone levels in men. The more sunlight exposure a man gets the more likely it is that he has elevated testosterone levels.
44. The average 70 kg (150 lb) adult human body contains approximately 7×10^27 atoms and contains at least detectable traces of 60 chemical elements, some of which are metals that were formed during massive explosions like Supernova.
45. A study done by the neurobiologists at the Weizmann Institute of Science in Israel found that the smell of women's tears will reduce men's sexual arousal and testosterone levels.
The over-stimulation in modern society caused by artificial light, electronic devices, internet connection, abundant food, processed foods, and other conveniences of modern life sometimes result in depression, anxiety, and sleep disorders due to being desensitized or oversensitized to various aspects of our own chemical control systems and chemicals like dopamine, serotonin, and melatonin.
47. Women’s nervous system takes a bit longer to “settle down” and return to normal than it does in men. This means is that as an argument winds down, a man will start feeling calmer relatively quickly, while a woman’s body remains in an agitated state even after the apparent resolution of the argument. Because everyone’s brain takes cues from the body, her brain realizes it’s still angry. So it starts casting about for other things to be angry about. Bam: Suddenly the argument flares up again, about a new subject.
48. Harry D. Andrews (1890-1981) was a young man when he was declared dead from spinal meningitis. He was revived with experimental adrenaline. He recovered, served in France in WWI. He later found out that his fiancé left him. Later he proceeded to carry 56,000 pails of stone from a river to build his own three-story castle.
49. There is something called sleep debt and if you do not reduce the debt you can experience worsened vision, impaired driving, and trouble remembering. Long-term effects include obesity, insulin resistance, and heart disease.
50. Cuddling (or other 'love' acts) helps to heal physical wounds faster due to the release of Oxytocin, which is proven to reduce swelling.