Boffins say Martian colonists could pee in buckets, give blood if they want shelter

In terms of building materials, Mars has nothing to offer but blood, soil, sweat and tears. And urine. Lots of urine
A group of boffins from the University of Manchester have proposed an innovative if unexpected way of creating structures for any future Mars colony: mixing the bodily fluids of the first colonists with Martian soil to create super-strength concrete.…