Yva Momatiuk & John Eastcott / Ripples on white gypsum sand dunes, White Sands National Park, New Mexico

Tim Fitzharris / Vervain (Verbena officinalis) at Franklin Mountains State Park, Chihuahuan Desert, Texas

Tim Fitzharris / Opuntia (Opuntia sp) in Chihuahuan Desert landscape, Big Bend National Park, Texas

Tim Fitzharris / Agave (Agave sp) plants and Chisos Mountains seen from Chisos Basin, Big Bend National Park, Chihuahuan Desert, Texas

Tim Fitzharris / Cloud over White Sands National Park, Chihuahuan Desert, New Mexico

Michael & Patricia Fogden / Southern Grasshopper Mouse (Onychomys torridus) male singing on its territory, Chihuahua Desert, Mexico

Yva Momatiuk & John Eastcott / Gypsum sand dunes, White Sands National Park, New Mexico

Yva Momatiuk & John Eastcott / Gypsum sand dunes, White Sands National Park, New Mexico

Yva Momatiuk & John Eastcott / White gypsum sand dunes, White Sands National Park, New Mexico

Yva Momatiuk & John Eastcott / Ripples in white gypsum sand dunes, White Sands National Park, New Mexico

Yva Momatiuk & John Eastcott / Hikers among white gypsum sand dunes, White Sands National Park, New Mexico

Yva Momatiuk & John Eastcott / White gypsum sand dunes, White Sands National Park, New Mexico