Meet the first fish with a backbone. Then, witness the dawn of reptiles. Watch Surviving Earth on Thursday at 8/7c on NBC and next day on Peacock. #NBC #SurvivingEarth » Subscribe for More: bit.ly/NBCSub Find NBC trailers, full episode highlights, previews, promos, clips, and digital exclusives here. NBC ON SOCIAL: YouTube: youtube.com/nbc Twitter: Twitter.com/NBC Facebook: Facebook.com/NBC Instagram: instagram.com/nbc ABOUT SURVIVING EARTH: Eight epic eras. One thriving planet. From the producers of Walking with Dinosaurs, this awe-inspiring docuseries journeys across 450 million years to explore Earth's major extinction events and the creatures who fought to survive along the way. The First Animals to Evolve a Backbone; The Age of Reptiles Begins | Surviving Earth | NBC youtu.be/0hNN8Ga9zLs NBC on YouTube youtube.com/user/nbc