began a nasa-funded study to look for life in the most unfriendly environments. like, the boiling, acidic hot springs of porcelain basin. there is enormous amount of these chemical gradients happening and organisms are using things belike arsenic and sulfur and iron as their energy source. reporter: and the life mark discovered? a fungus microbe that grows incredibly fast and clean, and as they showed me back in chicago, has the natural texture of a chicken breast. and, they claim, all the digestible protein and amino acid of a prime cut of meat. they call it fy, spelled fy. and amazingly, that first sample is they will ever need. do you have to come back here to get more fy? never. never? so we re not going to put factories here.