Clip
The Competitive World of Sperm
1:20:01 - 1:22:20 (02:19)
The survival of the fittest takes on a new meaning as sperm race to fertilize an egg, competing with each other and facing numerous obstacles along the way.
The survival of the fittest takes on a new meaning as sperm race to fertilize an egg, competing with each other and facing numerous obstacles along the way.