sebas cal started mulling over how to solve one of the big problems. >> using animals as a food source is by far the most destructive -- you're not going to solve the problem by trying to get people to change what they eat. it's just absolutely not going to work. that meant that the only option was to figure out a much more sustainable way to produce the foods that people are going to continue to demand. >> so in 2011 he traded his classroom for a laboratory where he got together a top secret team of scientists to work on finding the answer to one big question. just what is it that makes meat so tasty? they started with ground beef. >> the very first time we tested the proto type, it was characterized by some of our tasters as tasting like rancid polenta. >> we can get better every single day, and the cow stopped getting better a million years ago at making meat. >> a couple of years in they had a proto type in hand, and it was