Atlantis is said to be an advanced civilization that existed on this planet in the past. There are many theories as to who this civilization was and if they were originally from this planet at all. The location of Atlantis is also not fully known. Some people also believe that some of the people in power today are descendants of these Atlanteans of ancient times.

If Atlantis really did exist and advanced technology was around a long time ago it greatly challenges the theory of evolution and of present day humans being the most advanced beings on this planet. Some people will point to structures like the Great Pyramid of Giza as structures that were either built during this time, or constructed based off the technological knowledge that these people had during this time.