it was found in mono lake survives without fphosphorus. this replaces phosphorus with the chemical cousin, arsenic. it uses that toxic element to thrive. >> you can replace it with arsenic and not kill yourself. it's quite striking. when we look for life on other worlds, we could maybe look in a different way. >> the nasa-funded research say this breakthrough bacteria illustrates how little they know about life forms here on earth and possibly beyond. >> maybe we will be able to find it now. we have more information about what we might be looking for. >> not aliens per se. not even little green men. possibly microscopic green men that hide in far away worlds. worlds with a different make up than our mother earth. kirk gregory, nbc news. >> there you go. a poison eating being found in a lake. i have seen movies and i know what happens. >> over here in the other dark room. let's look out the roadways. we are over here on southbound 680 and another accident. sounds like a minor issue. it's after the junction. southbound as you head down towar