TIL in 1957, a nuclear explosion blasted a manhole cover in the air at 150,000mph (six times Earth’s exit velocity). Scientists think it was either vaporized, or blasted into space.

TIL in 1957, a nuclear explosion blasted a manhole cover in the air at 150,000mph (six times Earth’s exit velocity). Scientists think it was either vaporized, or blasted into space.