Newton and Leibniz then got into a bitter dispute over who was first [to invent calculus]. Leibniz wrote to the British Royal Society to ask for a committee to investigate the matter. But at that time the society’s president was… Isaac Newton. And Newton simply drafted the report himself. He wrote “we reckon Mr Newton the first inventor” and then presented it to the members of the committee to sign, which they did…
Electric lights came in use around the end of the 19th Century. At first, they all worked with Thomas Edison’s direct current system, DC for short. But his old employee Nicola Tesla had developed a competing system, the alternate current system, or AC for short. Tesla had actually offered it to Edison when he was working for him, but Edison didn’t want it… He paid Brown to build an electric chair with AC generators that they bought from Westinghouse and Tesla, and then had Brown lobby for using it to electrocute people so the general public would associate AC with death.
Together the two men discovered 136 species of dinosaurs (Cope 56 and Marsh 80) but they died financially ruined with their scientific reputation destroyed [over their feuds].Sabine Hossenfelder, “Epic fights in science” at BackRe(Action) (February 12, 2022)
Much more at the link.