Is it possible to build a time machine? Can we time travel someday? That’s what Tumble listener Willa wants to know. Clifford Johnson, a theoretical physicist and film consultant, says that there’s real science behind the time travel - and he’ll tell us what it takes to do it. To learn more about time travel, go visit our blog at sciencepodcastforkids.com, where you can find all sorts of awesome resources to go along with this episode. This is our last episode of season 9! If you like what we do, why not support our show on Patreon? Just go to patreon.com/tumblepodcast and support us at any level for ad-free episodes, or for $5 a month you can hear a happy birthday wish on our show. Visit our Threadless shop to get awesome tumble t-shirts: tumblepodcast.threadless.com