In Einstein’s Universe, Airplanes and Staircases are Time Machines

12 noviembre 2014

Recent experimental optical clocks are so precise that even a small change in elevation or velocity makes them register the passage of time differently

— Read more on ScientificAmerican.com

http://rss.sciam.com/~r/sciam/physics/~3/aHqDrSCB2OU/