If you want evidence of evolution by natural selection, look no further than your own body. Whether it’s your tailbone, goosebumps, or a weird little tendon on your inner wrist, the human body is covered with parts that don’t serve any purpose to us anymore.
Yet they’re still there as a genetic relic from our evolutionary past. The same is true for many other animals – just think of the wings on an ostrich. These are called “vestigial” characteristics. The video below by Vox shares a few of these vestigial traits that you might not even know you have, along with an explanation of where they have come from.