Related by context. Frequent words. (Click for all words.) 61 surface 47 Inc. Nasdaq SRDX 46 subsurface 46 Loose Granular LSGR 44 surfaces 44 silicon substrate 44 macroscale 44 nanoporous 44 Santa Anita synthetic 44 lunar craters 43 silicon oxide 43 nanosized 43 shallower 43 infilled 43 electrically conducting 43 chemical reactivity 42 polar craters 42 onto lightly floured 42 absorbs sunlight 42 surficial 42 Martian rocks 42 adsorbed 41 temperature gradients 40 abrade 40 biofouling 40 aragonite 40 martian soil 40 conductivity 40 leached 40 scanning electron microscopy 40 Martian landscape 39 stockwork veining 39 biodegraded 39 substrate 39 Homestake Silver 39 Martian soil 39 photosphere 39 coating 39 lunar soil 39 previously undrilled 39 bubbled 38 clastic 38 lurk beneath 38 surface roughness 38 Martian dust 38 underfill 38 Gusev crater 38 twin rover Spirit 38 gossanous 38 grippier 38 Nanotube 38 beneath 38 lurking beneath 38 deformable 38 iron oxides 38 copper oxides 38 comet tail 38 metalized 37 lurked beneath 37 erosional 37 oil sheens 37 bumpier 37 heavily cratered 37 Surface 37 silicates 37 micrometre 37 geochemically anomalous 37 martian surface 37 Martian arctic 37 heatproof 37 microstructures 37 lotus leaf 37 massive sulfides 37 magnetic susceptibility 37 refreezes 37 electrical conductivity 37 crushed limestone 37 tiny pores 37 overlying 36 hardpack 36 Ultrathin 36 softish 36 methane crystals 36 subglacial 36 glacial till 36 bubbling 36 Endurance Crater 36 calcrete 36 oxidise 36 icy moons 36 rougher 36 leaking wellhead 36 Anomalous gold 36 bumpiness 36 trenched 36 kaolinite 36 sulfide minerals 36 compacted soil 36 Martian surface 36 bathymetry 36 deform