A decade before Elon Musk founded his fast-rising rocket company, SpaceX, or ever spoke publicly about colonizing Mars, a different billionaire captivated the world with Biosphere 2.
Oil tycoon Ed Bass spent about $250 million to build and operate that facility as a proof-of-concept for a permanent, self-sustaining habitat on Mars. Four men and four women sealed themselves inside the nearly airtight space in September 1991 and emerged two years later.
The experimental space-age facility served as the stage for a spectacular and controversial story of human endurance. Built into a hillside of the Arizona desert read more >>>
Source : BusinessInsider.Com