7 Theories About You That Will Make You Question Everything

5. You're An Alien

Well, not just you. If you listen to a guy call Ellis Silver, everyone else is an alien too.

Panspermia is the theory that amino acids and other organic building blocks to life (perhaps even single cells) might have been delivered to the Earth and other planets via meteor, but Ellis Silver goes even further to suggest that we arrived, human shaped, on this planet as aliens that got kinda stuck.

Silver thinks that the human species is so maladapted to life on planet Earth that we must have come from somewhere else. He cites everything from the fact that we get bad backs (as we're not used to this planet's gravity) and sunburn (because we're not used to the sun), to our rapid population, which points to us being an invasive species.

Silver's arguments should be taken with a supersized pinch of salt, considering that we can trace our DNA way back through the evolutionary tree. He himself says that they are supposed to provoke debate rather than be taken as gospel, but it makes you think...