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IN Weird ON 27 Aug, 2015
Darwin's theory of evolution has been one of the most revolutionary and unquestioned theory since it was first proposed. And probably there isn't a person who doesn't know about the theory of evolution. But evolution leads to the development of new things, and sometimes makes a few older things redundant. In both cases, the result that comes out is a weird one! Here are nine such weird things that resulted from evolution!
You may be surprised to know that humans are the only species on Earth that have exposed lips!
A long, long time ago, pre-humans were primarily herbivores, which meant they ate a lot of green stuff. Because green vegetation takes longer to digest, it needed to be chewed more, and wisdom teeth gave the extra surface area needed to grind the greens into pulp. This was the reason for the evolution of wisdom teeth, which sadly, today is only a pain!
The tailbone is a residual part of the body that resulted from the devolution of the tail. We all know how humans have evolved from apes. There was a time when we had a tail behind us, but as we evolved, the tail shrunk. What is left over today is the tailbone.
In herbivores, there's an organ called the cecum, which helps to breakdown and process cellulose so the body can better digest it. Since our ancestors were herbivores, they too had a cecum. As time passed and humans began eating more and more meat and less and less vegetation, the cecum shrunk into what we now call the appendix.
Although the ability to wiggle your ears is rare with only 15 percent of the population being able to do it, in the past, everyone did it. And it won't surprise you to know that monkeys still do have the ability.
Goosebumps are the result of flexing muscles at the base of each hair follicle. There are two reasons humans get goosebumps.
Sort of like the appendix, hiccups are left over from old body parts we no longer needed. If you go far enough back the family tree, you'll come to a time when human ancestors lived in both water and on land. Because of this, there was this thing called a glottis at the entry to the lungs that would close off to not allow water into the organ. While the glottis is no longer there, a small trace remains. This underdeveloped muscle sometimes contracts when sucking in air and this uncontrollable contraction is what we now call the hiccups.
Before we were bi-pedal, we spent a lot of time bent over, walking on our knuckles and having our rear ends out there for everybody to see. It seems as we stood more and more upright, our butts became less and less visible. Almost in direct correlation with that, women's breasts started to become more and more developed. A theory suggests that breasts grew rounder and more prominent to mimic the look of a woman's bent over ass and help her attract a mate. Well, we can't necessarily say that they look like an ass, but we definitely know breasts help to attract a mate!
The corner of the eye (near the nose) has no true function today. It is doubted if they ever had any function in the first place, but whatever it be, it is one of the strangest creations of evolution.