Juan Carlos Munoz / Detail of geological rock formations in the sandstone cliffs of Jaizkibel Beach, Gipuzkoa, Basque Country, Spain, May 2012

Alex Hyde / Close up of feathers of cock Pheasant (Phasianus colchicus).

Jeff Foott / California Poppy (Eschscholzia californica) and Goldfield (Lasthenia californica) flowers, Antelope Valley, super bloom, California

Suzi Eszterhas / Prickly Pear Cactus (Opuntia mercerize) close-up of stamen and petals of flower, Red Corral Ranch, Texas, USA

Juan Manuel Borrero / Sunflowers {Helianthus annuus} Spain

Bernard Castelein / Ragwort flower {Jacobaea vulgaris} Belgium

John Cancalosi / Sunflower close-up {Helianthus annuus} Spain

Jeff Foott / Contrails, Carrizo Plain National Monument, California

Martin van Lokven / Trees in autumn, Alaska

Konrad Wothe / Deciduous forest in autumn, Bavaria, Germany

Konrad Wothe / Deciduous forest in autumn, Upper Bavaria, Germany

Ingo Arndt / Tulip detail showing pistil and stamens, cultivated worldwide