There's life on Mars!

[Bahamut2000X]

Is it true that some people consider it a feasible theory that martians life under the surface of the planet?

Or is it just a fat load of bs?

There's people who think the nazi's retreated to the hollow center of the Earth and conquered the subterranean people.

I'm sure there's some quacks out there who think an entire civilization has been hidden under a lifeless planet's surface.