What is time?

Check out mathematics and science courses on Brilliant! Start learning for free at https://brilliant.org/sabine/ and get 20% off a premium subscription, which includes daily unlimited access! What is time? That question is hard to answer because it’s really asking a bunch of different questions, like “Why does it feel like time passes?”; “What separates now from the future and past?”; “Where does time come from?” and “What do we even mean by time?” Today I have a look at all those questions and what physics has taught us about them. 👕T-shirts, mugs, posters and more: ➜ https://sabines-store.dashery.com/ 💌 Support me on Donorbox ➜ https://donorbox.org/swtg 👉 Transcript with links to references on Patreon ➜ https://www.patreon.com/Sabine 📝 Transcripts and written news on Substack ➜ https://sciencewtg.substack.com/ 📩 Free weekly science newsletter ➜ https://sabinehossenfelder.com/newsletter/ 👂 Audio only podcast ➜ https://open.spotify.com/show/0MkNfXlKnMPEUMEeKQYmYC 🔗 Join this channel to get access to perks ➜ https://www.youtube.com/channel/UC1yNl2E66ZzKApQdRuTQ4tw/join 📚 Buy my book ➜ https://amzn.to/3HSAWJW #science #philosophy #physics