Are Earth's Deepest Caves The Last Frontier?

Part 2 of the TED Radio Hour episode To The Edge.

About Bill Stone's TEDTalk

“ Why do it? I'll tell you why. It's because it is the real frontier on Earth. It is the last terrestrial frontier for humans.

Bill Stone is a maverick cave explorer who has plumbed Earth's deepest abysses. In this talk, he explains what it's like to descend into the deepest caves in the complete darkness for days on end — and why he keeps doing it.

About Bill Stone

Engineer and daredevil caver Bill Stone pushes the frontier — through flooded tunnels, the remotest depths of the Earth and the limits of human endurance. He's currently planning to mine moon ice by 2015 and build an autonomous robot to visit the icebound sea of Jupiter's moon Europa.

His new Shackleton Energy Company intends to raise enough money to mine ice thought to be trapped on the moon's southern pole at Shackleton Crater, and to sell derived products on the moon and in low earth orbit to international consumers.

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