다음 채널에서 시청 가능: PBS Video
시즌 1, 에피소드 1: How successful are we compared to other species? It turns out that biomass, or what things weigh, can be more important than how many of something there are. Find out how our numbers stack up against everything from bugs to bacteria, and get ready for some mind-blowing numbers!
Documentary · 2013년 3월 4일 · 4분