[MagicHef]

Originally Posted by Donger

For those interested. I didn't realize that they were planning on 100% Mars-generated fuel for the return.

https://www.spacex.com/human-spaceflight/mars/

Yep, that's why the Raptor engine is so important, methane can be made on Mars. The flying water tower last year was the first time ever that a methane full flow staged combustion engine took flight.