Astronomy author and speaker Colin Stuart explains why time has an arrow, its intimate relationship with space, and why it's impossible to go back in time and kill Hitler.
Once you’ve mastered the basics with Instant Genius, dive deeper with Instant Genius Extra, where you’ll find longer, richer discussions about the most exciting ideas in the world of science and technology. Only available on Apple Podcasts.
Produced by the team behind BBC Science Focus Magazine. Visit our website: sciencefocus.com
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