Islamabad: Russian cosmonaut Sergei Krikalev has spent more time in orbit around the Earth than anyone else, which amounts to 803 days, 9 hours and 39 minutes.

According to Universe Today, the retired Russian space adventurer was also the world`s most prolific time traveler, the Daily Times reported.

Due to the effects of time dilation, Krikalev has actually lived for 0.02 seconds less than everyone else on Earth - effectively, he`s travelled 0.02 seconds into his own future.

The calculation relies on Einstein`s theories of relativity, which state that the passage of time is relative and different, for two objects moving at different speeds or experiencing different levels of gravity.