Scientific discovery is just a matter of who hits the right spot first. Banting, Best, McLeod, and Collip discovered insulin in 1921 by meticulously extracting it from pancreatic tissue. Meanwhile, Zuelzer and Reuter were literally inches away from the same discovery years earlier, but apparently chose to mine in the wrong direction. That's the difference between a Nobel Prize and a historical footnote—pure dumb luck and maybe a better pickaxe.