When you’re a kid, time passes a lot more slowly than when you’re an adult. At the age of seven, summer seems to go on forever, and the wait from New Year’s Day to Christmas feels like a decade. As an adult, time seems to go faster and faster until one weekend you’re putting up your Christmas lights though you swear you just took ‘em down a month ago.

Why does time seem to speed up as we get older? Astrophysicist Neil deGrasse Tyson recently explained the phenomenon in a video posted to Instagram. He also offered tips on how to slow the passage of time as you age. DeGrasse Tyson is one of the most popular science communicators in the world and the host of 2014’s Cosmos: A Spacetime Odyssey and 2020’s Cosmos: Possible Worlds.

Neil deGrasse Tyson explains why mortality may be the very thing that gives life meaning “living forever is to live a life of no meaning at all. Because if we knew we lived forever, we........

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