Daniel Heuclin / Mojave rattlesnake (Crotalus scutulatus) Mojave desert, California, June.

Jack Dykinga / Eroded Aztec sandstone, dating back to the Jurassic, 160 million years ago, colourful banding with fins and dikes produced by erosion, Mojave Desert near Las Vegas, Nevada, USA

Jack Dykinga / Silhouettte of Joshua tree (Yucca brevifolia) at sunset with lightning in background, Sonoran / Mojave transition zone, Joshua Forest Parkway, Arizona, USA

Jack Dykinga / Sand dune ridge, with waves in sand, East Mojave Desert, California, USA

Jack Dykinga / Birdcage evening primrose (Oenothera deltoides) growing in sand dunes, with beetle tracks in the sand, East Mojave Desert, California, USA

Jack Dykinga / Beetle tracks along the ridge of a sand dune in morning light, East Mojave Desert, California, USA

Jack Dykinga / Sand dune ridge, East Mojave Desert, California, USA

Jack Dykinga / Sand dunes at dawn with Tho Calumet Mountains in the distance, East Mojave Desert, California, USA

Jack Dykinga / Sand dunes in evening light, East Mojave Desert, California, USA

Jack Dykinga / Weathered and eroded monzogranite boulders balanced precariously, sunset, Joshua Tree National Park, Mojave Desert, California, USA

Jack Dykinga / Weathered and eroded monzogranite boulders with dikes on crystalline intrusions, sunset, Joshua Tree National Park, Mojave Desert, California, USA

Tim Fitzharris / California Poppy (Eschscholzia californica) flowers, Antelope Valley, California