Martian soil simulant
... that the Martian soil simulant used by NASA's Marshall Space Flight Center is made from Hawaiian volcanic ash?
... that the <b id="mwAtw"><a href="./Martian_regolith_simulant" id="mwAt0" rel="mw:WikiLink" title="Martian regolith simulant">Martian soil simulant</a></b> <i id="mwAt4">(pictured)</i> used by NASA's <a href="./Marshall_Space_Flight_Center" id="mwAt8" rel="mw:WikiLink" title="Marshall Space Flight Center">Marshall Space Flight Center</a> is made from Hawaiian volcanic ash?