I watched a video today that explains Vestigial Organs very simply. It even clears up the common misconception that vestigial organs are utterly useless. So without further ado, the video.
By the way, someone had commented on this video:
"Type in appendix. You will see that a news item was released last week that discovered the appendix is used for breeding good bacteria. I read the item last week. It reached the front page of reddit. That livescience article needs updating. Science has advanced in the last week"
Here's my response:
"That use (harboring useful bacteria) is not needed in a modern industrialized society, Parker said.
If a person's gut flora dies, it can usually be repopulated easily with germs they pick up from other people, he said. But before dense populations in modern times and during epidemics of cholera that affected a whole region, it wasn't as easy to grow back that bacteria and the appendix came in handy."
Another good link:
Evidences for Macroevolution: Vestigial Structures