Just because we do not have to use our appendix, does not mean that it is useless. Charles Darwin's theory that the appendix was a shriveled left over organ used by early humans has been the predominant thought until recently... A team of researchers developed a new theory.

Originally released by Smithsonian Media, 2014. Streaming video file encoded with permission for digital streaming by Infobase on March 10, 2015.

Why Do We Have an Appendix?: Ask Smithsonian (2:00); .