How fast do black holes spin?

Black holes bend space-time so abruptly that even light finds it difficult to escape their gravitational pull. Nobody knows what happens at the center of a black hole because the known laws of physics break down at the singularity. This puts them among the strangest known objects in the universe. But, mathematically speaking, a black […]

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5 ways to travel back in time

Time travel has always been a part of science fiction movies. Imagine going back in time to see the dinosaurs or traveling to the future to witness the Milky Way-Andromeda collision! Einstein’s Theory of Relativity tells us how ‘speed’ and ‘gravity’ affect time. Time slows down significantly around massive objects like black holes, neutron stars, […]

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