Support for NPR, and the following message come from Yarl and Pamela Mohn, thanking the people who make public radio great every day and also those who listen.

Have you ever fantasized about going back in time to relive a moment or change it?

Maybe you're more interested in traveling to the future where cars fly and the code

to immortality has been cracked. If the idea of time travel resonates with you, you're far from

alone, particularly during a year of political upheaval. I love the time travel series Outlander.

Now watching Season 7, I'm finding their treatment of the American Revolutionary War

period to be especially timely, given the 250th anniversary of our experiment in democracy.

I also have a lot of Scott's blood in my ancestral lines,

so the series has given me a lot of Scottish history, too.

I love that time travel can be a hook into understanding the past,

not only one's family history, but also one's beloved and democratic

country. Thanks for that message. This year, scientists move one step closer to understanding

time travel, at least hypothetically. Two physicists at the University of Queensland and Australia

laid out a model for studying the phenomenon.

So, no, we're not there yet,

but when it comes to books, movies, and TV shows,

that's a different story.

Wait a minute.

Wait a minute, Doc.

Are you telling me that you built a time machine?

Kind of a Delorean?

The way I see it,

...