Mars Colony

"What a wonderful arguably simple solution. Here’s the problem, we travel to Mars but how do we feed ourselves? Sure we can take a load of food with us but for the return trip that’s a lot. If we plan to colonise the red planet we need even more. We have to grow or somehow create food while we are there." https://www.universetoday.com/167408/fish-could-turn-regolith-into-fertile-soil-on-mars/