As they say, everything old is new again. That would be an especially delicious irony if future humans once again become cavemen -- on Mars.
A vision for troglodyte existence put forth by Germany's ZA Architects calls for astronauts to live in caverns under the surface of Mars that would be dug out by solar-powered robots.
This bold concept imagines living underground in tunnels chiseled from basalt that naturally forms in hexagonal shapes. Just imagine the house parties. … Read more