There is a well-known joke "nobody has ever done a solid randomized double-blind trial to test whether parachutes actually work." Now someone has -- and it tur

There is a well-known joke "nobody has ever done a solid randomized double-blind trial to test whether parachutes actually work." Now someone has -- and it turns out they don't have any effect! It's also possible that the paper criticizes some common features of "scientific" studies.