Scientists opened a sealed envelope after 10 years. Gravity still didn’t make sense

A decade-long NIST experiment has produced a new measurement of the universal gravitational constant that differs unexpectedly from another leading result, deepening a 225-year-old physics puzzle. The discrepancy is tiny, but for one of nature’s most fundamental constants, it is large enough to keep scientists wondering whether hidden experimental errors or something more surprising is involved. Scientists opened a sealed envelope after 10 years. Gravity still didn’t make sense.

Scientists opened a sealed envelope after 10 years. Gravity still didn’t make sense Date: September 20, 2026. Com For 10 years, physicist Stephan Schlamminger had been chasing one of the most stubborn numbers in science.

Now, after a decade of experiments, corrections, and painstaking analysis, the answer was sitting inside a sealed envelope. He was not entirely sure he wanted to open it. Schlamminger, a physicist at the National Institute of Standards and Technology (NIST), had spent much of the previous decade trying to measure the universal gravitational constant.