4부작으로 인간의 탄생에서 영원한 젊음을 유전적 관점에서 다룬 Biology 다큐의 명작이다.
Before science put it under microscope, sex was a simple, uncomplicated thing. You could not build humans without it. All you needed was a man, a woman, a liberal sprinkling of lust and Mother Nature did the rest. But is that now a terribly old-fasioned way of making new human? In the future we’ll able to build humans in tanks, make copies of ourselves in labs and even have the power to change the course of our genetic destiny by turning women into men. If kissing is nothing more than a way of sniffing out compatible genes, what is the point of sex, and will it ever be the same again?