Time flows slightly faster on the Global Positioning System satellites than it does on the ground, so Einstein's relativity theory comes into play when figuring out where on Earth you are.
March 27, 2020
March 4, 2020 — Rachel E. Gross, Jeffery DelViscio and Dominic Smith
February 5, 2020 — Jeffery DelViscio, Tanya Lewis and Amanda Montañez
January 15, 2020 — Kelso Harper
November 19, 2019 — Jeffery DelViscio and Kelso Harper