Astronauts could use their blood and urine to make Martian concrete

all construction projects require blood sacrifice; It Is Known. Them splinters ain't accidents, the spirits of the wood demand their tribute.

I'm glad to see the acknowledgement of the Old Wisdom in the thinking for construction in environments where such fluid transfer would otherwise be difficult, instead of the presumable accident it is most places.

Ever wonder why underwater construction is such a bitch? it's hard to get the blood where it's supposed to be.

If you’ve got blood and urine handy, you have water. If you have water, you don’t need blood and urine.

Now using the fluids of the deceased, that’s a plan!

And shit for growing foodstuffs, too.

Where are they planning to build their bases? Phobos?

Blood, sweat and tears. Literally!