A ‘friend’ of mine wants to lend me the book The Ten Most Beautiful Experiments which is about elegant and simple experiments done to figure out some really fundamental stuff about our universe. It sounds pretty good but I figured I should take a moment and come up with my own favorite experiments first before reading it. If there’s overlap I’ll seem on top of my game, if there’s not I’ll seem original. Win-win. So with that in mind I’d like to present my top four favorite experiments scientists (or just humans) have done and why I like them so much. Why only four and not five or even ten? I wrote too much and didn’t want to push your interest to the breaking point, so enjoy what you’ve got and suggest a 5th in the comments!