Tag: genitals
Fossil Friday: Rhenocystis and the Controversial Calcichordate Hypothesis
It looks a bit like a tadpole with body and tail, and this indeed points towards one of the great scientific controversies of the 20th century.
Doctor’s Diary: Evolution’s Countless Chicken-and-Egg Conundrums
It turned out last week that scientists have been wrong for 350 years about how sperm swim.