TED is a small nonprofit organization started out (in 1984) as a conference bringing together people from three worlds: Technology, Entertainment, Design. TEDTalks began as a simple attempt to share what happens at TED with the world. Under the moniker “ideas worth spreading,” the talks were released online to share with a global audience of millions. With a database of hundreds of jaw-dropping videos the above video of is just the tip of the iceberg and the key to many hours being spent in front of your computer. In this episode Bill Stone, a maverick cave explorer who has plummeted  to some of Earth’s deepest abysses discusses his efforts to mine lunar ice for space fuel and to build an autonomous robot for studying Jupiter’s moon Europa.