Grumpy Old Geeks Topics Simulated Martian soil Topic Simulated Martian soil 2 mentions in 1 episode The hosts discuss laboratory-made soil intended to resemble Martian dirt. Mentions 287: 20 Grand Wang Oct 8, 2018 58:04 20 bucks a kilogram, except it's not the real stuff. 58:20 It is made in a lab to basically match exactly what Martian dirt is like.