every day on this show at this time, we do a segment called "the big eye." it's all about big, new ideas and innovations. well, today, we are tackling water. according to unicef 900 million people in the world don't have access to clean drinking water. we want to tell you about a couple of new pretty cool solutions. first, how about a banana? "a banana used to detect dirty water. according to "discovery" magazine researchers found that dropping minced banana peels into river water could help them detect trace amounts of copper and lead. now we're not telling you of course to go out and buy a bunch of bananas, mush them up and throw them into your dirty water. this is just in the research stages. all right and check this out, it looks like a hamster ball, right? it's actually a device that creates clean, drinkable water from dirty water using the sun. and here to tell us all about it is the guy who created it. john leo. john, that's a really cool