Time feels like the most familiar thing in the world, yet it hides one of physics’ hardest questions: why do we only remember the past and never the future, and why do broken eggs not leap back into ...

Tourists of time all know one rule: never change the past. Whether it's preventing your own conception or handing the blueprints to a time machine to a younger version of yourself, generating a ...

In the 1970s, Stephen Hawking discovered something impossibly wrong with black holes: It was mathematically possible for them to shrink or even disappear. If a black hole disappeared, that would mean ...

(via Sabine Hossenfelder) The Andromeda Paradox, originally from Roger Penrose, is a brain-melting thought experiment that brings up the question of whether the future is still open or already fixed ...

Alfredo has a PhD in Astrophysics and a Master's in Quantum Fields and Fundamental Forces from Imperial College London.View full profile Alfredo has a PhD in Astrophysics and a Master's in Quantum ...