10 Places on Earth Where Time Runs Differently

10. Airplane at Cruising Altitude (Anywhere)

At cruising height, time moves a little faster—about 20 nanoseconds each year on average. At 35,000 feet, gravity is weaker, so clocks tick just a bit faster. But the plane’s fast speed slows time down a little, too. In the end, people on planes age slightly faster than those on the ground.