William Shatner never saw Earth the same after going to space — he's not alone

In a new book, Shatner described a profound mindset shift — one that many others have also experienced.

William Shatner portrays Captain James T. Kirk, captain of the starship Enterprise on the TV series ...
Bettmann/Bettmann/Getty Images

Spending time in space takes a toll on the body.

And for many space travelers, it can alter the mind as well — or rather, one’s perspective.

Many astronauts and space travelers experience a phenomenon called the overview effect.

Coined in 1987 by writer and philosopher Frank White, the idea encompasses a change in perspective when people fly to space and see Earth as a small part of a whole.

Space Frontiers/Archive Photos/Getty Images