Why do we have fingerprints?
We all know that our fingerprints are so unique that no two people have the same ones, not even identical twins. But why do humans have these swirly patterns on their fingers in the first place? For many years, scientists thought they were there to help human fingers grip things… but it turns out, fingerprints actually allow less of our skin to come into contact with objects than perfectly smooth fingertips would. So they have nothing to do with gripping. While there are a few theories about the evolutionary purposes of these unique patterns, including that they protect our fingers or provide touch sensitivity, scientists haven’t been able to figure out a definitive explanation. We bet you didn’t know that these other body parts are as unique as our fingerprints.
Why do we have an appendix?
As an organ that causes many people lots of pain and whose removal has absolutely no effect on our bodies, the appendix seems to be more trouble than it’s worth. For many years, scientists, all the way back to Charles Darwin, were in agreement that, while a plant-eating human ancestor needed an appendix for digestion, it was only left over from evolution and had no real function for modern humans. However, another theory has become more and more popular in the scientific community lately, postulating that the tube-like organ actually houses and protects a host of good bacteria. We’ll have to wait and see if this theory is proven and the appendix gets its groove back. Here are the reasons we have 7 other bizarre body parts.