The deep Sahara isn't really like the typical American Sonoran desert -- where there are cacti, hawks, scub-grass, etc. Large parts of the deep Sahara is just.

The deep Sahara isn't really like the typical American Sonoran desert -- where there are cacti, hawks, scub-grass, etc. Large parts of the deep Sahara is just... sand, and a few rock outcroppings. I'm sure there's some tiny microbiome I'm missing, but it ties anywhere on earth (except maybe the deep Antarctic ice sheets) for "completely devoid of life." Any infrastructure requires some trade-off... but this really is a pretty good one.