Jeff Bezos built a huge rocket engine and now Elon Musk has real competition
https://qz.com/1107627/jeff-bezos-space-company-blue-origin-tested-a-powerful-be-4-engine-that-could-take-a-rocket-to-the-moon/
Behold six glorious seconds of the most powerful natural-gas powered rocket engine you’ve ever seen:
First hotfire of our BE-4 engine is a success #GradatimFerociter pic.twitter.com/xuotdzfDjF