Grant Dixon / Wind cloud over Mount Everest seen from Sagarmatha National Park, Nepal

Grant Dixon / Ice and frost patterns on window

Grant Dixon / Dwarf Fireweed (Epilobium latifolium) with mountains in the background, Ammassalik, Greenland

Grant Dixon / Mount Asgard with skiiers hauling sleds in foreground on Turner Glacier, Auyuittuq National Park, Baffin Island, Canada

Grant Dixon / Dolerite columns, Cape Raoul, Tasmania, Australia

Grant Dixon / Callanish standing stones, erected approximately 2,000 BC, Isle of Lewis, Outer Hebrides, Scotland

Grant Dixon / Old Man of Hoy, a sandstone pillar popular with rockclimbers, Hoy, Orkney Islands, Scotland

Grant Dixon / Monkey Puzzle Tree (Araucaria araucana) branch detail, Conguillio National Park, Chile

Grant Dixon / Southwest face of Alpamayo, Cordillera Blanca, Peru

Grant Dixon / Southwest face of Alpamayo, Cordillera Blanca, Peru

Grant Dixon / Lobelia (Lobelia telekii) and Giant Groundsel (Dendrosenecio keniodendron) which is endemic to Mount Kenya, Kenya

Grant Dixon / Arid landscape of the Altiplano, Bolivia