The Mysterious Reason Why Earth has a Perfect Moon | Bedtime Science Stories

Why does Earth, alone among the rocky planets, get a huge, perfect Moon? Mercury has none, Venus has none, Mars makes do with two captured potatoes — and then there's us, hauling a companion a quarter of our own width, at exactly the right size to hide the Sun. The answer goes back to the worst day this planet ever had. Four and a half billion years ago a whole world struck the young Earth, the surface flashed hotter than the face of the Sun, and out of the wreckage the Moon pulled itself together. We follow the century of wrong guesses that came before — and the Apollo rocks whose fingerprint reads, impossibly, as Earth. Then the gifts: the tides, the steadied seasons, and a coincidence so clean it looks rigged. And one quiet fact the serene grey face has been hiding the whole time. For now. Look up at the same face every human who ever lived has seen — where would you guess that Moon came from, before you knew? Tell me in the comments. Chapters: 0:00 The face that never turns away 1:00 Too big to make sense 5:54 The worst day the Earth ever had 8:55 A whole world, in a hurry 12:17 What the Apollo rocks confessed 14:13 The crisis in the numbers 21:04 Why we only ever see one face 23:06 The first look at the hidden side 24:46 A century of wrong answers 40:54 The quiet gift overhead 46:38 The tides, and what they cost 53:29 The coincidence that hides the Sun 56:00 The fact the grey face hides 60:57 A piece of home in the dark #BedtimeScienceStories #Science #ScienceStories #HistoryOfScience #PopularScience #Moon #Astronomy #Space #GiantImpact #SolarEclipse #PlanetaryScience