Comments on: Is time travel even possible? An astrophysicist explains the science behind the science fiction https://lifeboat.com/blog/2023/11/is-time-travel-even-possible-an-astrophysicist-explains-the-science-behind-the-science-fiction Safeguarding Humanity Tue, 14 Nov 2023 01:22:24 +0000 hourly 1 https://wordpress.org/?v=6.6.2