Eh, a few of those things are exaggerated to make the comic's point. For instance, X-rays were "discovered' by multiple people, including some before Tesla. If you want to talk about who developed our modern theory, it was Röntgen. Edit: and implying that Röntgen robbed Tesla in any way similar to Edison is bs. Röntgen gave away all the money he got from the Nobel prize, and he never pursued patents on anything because he believed that everyone should benefit from it.