Here are some unsolved Mysteries of Human Body
Many species produce tears to flush the eyes of irritants or as a response to pain. However, humans are the only known species to cry as an emotional response. In fact, scientists discovered emotional tears are chemically different than tears we cry to flush our eyes. These tears contain more protein making them stick to the skin and fall more slowly than other types of tears. The exact purpose of emotional crying remains a mystery to scientists though.
One of the strongest theories suggests emotional crying was a way for our ancestors to signal distress or sadness while maintaining safety. Since tears are only visible at a close distance, only people that are near to us and most likely trusted could read the signal. Some scientists believe this up-close and personal signal was a key component of humans developing emotional intelligence.
The brain responds the same way to personal emotion as it does to seeing someone else’s emotions. Being able to understand nonverbal emotional cues in one another fosters empathy, compassion, and social bonding. Over time we’ve developed the ability to even distinguish between the different reasons for crying. Humans are remarkably good at knowing if someone is crying because of joy, sadness, guilt, or shame.
Hairy is one of the biggest unsolved mysteries. Theories abound when it comes to pubes. Some say these coarse, curly tendrils are sexual ornaments — a visual signal of sexual maturity and a reservoir of smelly pheromones. Others think bushes keep our oh-so-precious nether regions cozy. Still others assert that they serve as padding, preventing chafing during sex. Whatever the reason, many modern people want this stuff gone.
What’s up, buddies?
A couple of handfuls of your body aren’t actually your body. For every one of your cells, 10 microbes live inside you, and these hangers-on collectively compose a few pounds (1 to 3 percent) of your total weight. Some of this in-house fauna cleans our skin while some helps us digest food, but the bulk of these microbes contribute to our bodily functions in ways unknown. Healthy people even harbor low levels of harmful viruses, which appear to do something besides sicken us.
“We’re just learning that the consequence of antibiotics is that when you get rid of the good bacteria in our guts, we can develop autoimmune diseases [such as Type 1 diabetes]. We’re not as advanced in our understanding of viruses. What do viruses do for us?” Vincent Racaniello, professor of microbiology and immunology at Columbia University, told Life’s Little Mysteries. Clearly, we’ve signed up for a whole bunch of symbiotic relationships, and have no idea what we’re getting out of the deal.
Scientists have discovered a new piece of human anatomy we never knew we had—a layer of connective tissue that exists all over the body. It sits below the skin’s surface, lining the digestive tract, the lungs, and even our blood vessels. Researchers say it could be the missing link the medical community needs to move forward in a number of areas of research, including cancer and autoimmune disease.