If a coin-sized black hole appeared on Earth… what actually happens? 🕳️🌍 First: a coin-sized black hole isn’t “small.” It would have the mass of a mountain compressed into a few centimeters — which means gravity so extreme that nothing nearby could escape, not even light. Within seconds, it would begin pulling in air, rock, water… basically anything within reach. As it feeds, it becomes heavier, which makes its pull even stronger. This creates a runaway cascade scientists call accretion — and the energy released would be far more violent than any explosion humans can create. The result? Earth wouldn’t explode, but it would be slowly shredded as the black hole sinks toward the center, devouring matter and releasing enormous radiation as it grows. Luckily, physics gives us a comforting fact: Black holes of that size can’t naturally form on Earth and are not expected to appear randomly. STEM takeaway: extreme scenarios are great for understanding physics — not for losing sleep. 😉 ...