The Marble-Sized Black Hole That Would Swallow Earth | Naked Science

What would it really take to erase an entire planet? Naked Science puts Earth on the chopping block and tests the most extreme ideas from real physics and engineering. From a marble-sized black hole with planet-crushing gravity to Lawrence Krauss’ escape-velocity golf shot, we push beyond sci-fi into hard science. Phil Plait explains spaghettification, Cassini’s gravity assists become a terrifying blueprint for dropping Earth into the Sun, and an antimatter bomb the mass of Mount Everest gets aimed 4,000 miles down. At NASA Ames, a vertical gun range recreates a head-on planetary impact, while self-replicating robots and rock-eating nano-machines hint at a quieter, relentless end. Which threat actually could do it, and which fall apart under real-world limits like energy budgets, orbital mechanics, and manufacturing? The answers are stranger—and more sobering—than you think. Watch to see which planet-killer stands a chance, and why Earth’s brutal resilience still wins in the end. Watch now and decide which scenario keeps you up at night. #NakedScience #BlackHole #Antimatter #GravityAssist #NASA #PlanetaryScience