updated 9:56 AM EDT, Mon May 20, 2013 | Filed under: Innovations
Bill & Melinda Gates Foundation has launched "Reinvent the Toilet Challenge"
A group of Caltech student's won the challenge in 2012
Producer's note: To put it bluntly, there are not enough proper toilets in the world to keep up with spiraling population growth. Here, we met up with some bright minds on the campus of CalTech to see their "toilet of the future."