Vacuum freezing 55 Validation 92 Valles Marineris 19 Valley glaciers 22 Valleys 784 Valves 30 Vanadium 28 Vapor barriers 55 Vapor diffusion 230 Vapor pressure 198 Vapor transfer 227 VAPOR TRANSFER 19 Variance analysis 160 Variations 2,052 Variograms 33 Varves 316 Vascular taxa 89 Vega Island 33 Vegetation 5,703 VEGETATION 448 Vegetation factors 588 Vegetation patterns 1,442 VEGETATION PATTERNS 21 Vehicles 510 VEHICLES 73 Vehicle wheels 102 Veins 132 Velocity 3,372 VELOCITY 18 Velocity analysis 23 Velocity measurement 388 Velocity structure 223 Vendian 88 Veneroida 18 Ventifacts 32 Ventilation 506 VENTILATION 21 Vents 50 Vermes 324 Vermes--Breeding cycles and reproduction 18 Vermes--Ecology 77 Vermes--Geographic distribution 153 Vermes--Morphology 179 Vermes--Physiology 43 Vermes--Population 83 Vermes--Taxonomy 227 Vernadskii Station 53 Vernadskiy Station 30 Vernadsky Station 44 Vertebrata 4,298 Vertical movements 115 Vertical orientation 46 Vertical seismic profiles 69 Very long baseline interferometry 30 Very low frequencies 26 Vessels 30 Vestfjella 25 Viability 59 Vibration 394 Victoria Group 23 Video methods 121 Viking Program 95 Viruses 75 Viscoelasticity 294 VISCOELASTICITY 24 Viscoelastic materials 64 Viscoplastic materials 29 Viscosity 867 VISCOSITY 18 Viscous flow 93 Viscous materials 24 Visibility 371 VISIBILITY 29 Vistulian 84 Visualization 92 Vitreous ice 51 Vitrinite 25 VLF emissions 341 VLF emissions--Dawn chorus 35 VLF emissions--Hiss 86 VLF emissions--Whistlers 246 Volatile organic compounds 80 Volatiles 287 Volatilization 35 Volcanic 79 Volcanic ash 359 Volcanic breccia 21 Volcanic earthquakes 85 Volcanic features 277 Volcanic fields 19 Volcanic glass 38 Volcaniclastics 157 Volcanic risk 37 Volcanic rocks 2,005 Volcanism 1,218 Volcanoes 1,224 Volcanology 707 Volume 700 Vorticity 109 Voyager Program 36