<p>The Big Fxxking Rocket is fxxking big. At 400 feet tall, it’s the height of a 40-story skyscraper. At 40 feet in diameter, a school bus could fit entirely underneath its footprint. It’s more than three times the mass and generates over three times the thrust of the gargantuan Saturn V-the rocket used in the Apollo mission-which currently stands as by far the biggest rocket humanity has made.</p>