Watson and Crick is named after the doctors picured. Before I go more in depth here is a elementary explanation through a video https://youtu.be/Bh5_e5A52gY. That was cool right!
Before we get into it unfouranately Rosland Franklin did not get her fair share of credit for helping to discover this structural type of DNA. She died before she they received the Noble prize and deceased people don't get Nobel prizes. SORRY Rosland Franklin!😢
What they discovered was a double helix. That is a type of DNA strand they were the first to be able comprehend and understand what this is and the purpose of it. That is a big deal because that lead to the discovery of something called Down syntdrome because we understand a double helix we can under stand how Down syndrome happens. But that is a conversation for another day.