Satellite Time Travelers....

There are currently 31 GPS satellites in orbit around the earth helping us find our way to grandma's house, to the new trendy bar, and our very own home.  Most people don't realize that those satellites are actually traveling in time, well on a micro level. Time is relevant depending on the closer and farther you get away from a gravitational force. Those orbiting satellites are actually off by 3,000,000,000th of a second every single day do to their distance from the earth and need to be calibrated accordingly to make sure the time is constantly correct. If they weren't constantly reconfigured you would be 6 miles off from your grandmas house.