51�Թ�

We made up a song about diatomaceous earth while we were driving in to the post office today, just because we thought it sounded funny.

Mixed with diatomaceous earth, a fine powder of algae fossils often used by gardeners, the coarse gray stuff makes a decent substitute for the density and texture of Mars’ dirt.

It suggests diatomaceous earth and commercial rust remover, blended to the consistency of peanut butter.

This four-mile formation, composed of clay and diatomaceous earth, has been a conservation priority of the tribe, the Chesapeake Conservancy, the U.S.

Some people also recommend sprinkling a layer of diatomaceous earth on top of soil to kill them.