Mystery Sealed for 10 Years: Scientists Still Can't Solve Gravity's Secret

A physicist named Stephan Schlamminger spent an entire decade doing super-careful experiments to measure gravity's strength, but he sealed away the answer in an envelope so he wouldn't accidentally peek at it! When he finally opened it after 10 years, the results were surprising—gravity is even trickier to understand than we thought, and scientists are still scratching their heads trying to figure out why.