Mark Bowler / Aerial view of Amazon rainforest with river, Peru

Juan Carlos Munoz / Aerial view over subtropical mangrove wetlands of the Everglades National Park. Florida, USA, February 2012.

Juan Carlos Munoz / Aerial view over subtropical mangrove wetlands of the Everglades National Park. Florida, USA, February 2012.

Juan Carlos Munoz / Aerial view over subtropical mangrove wetlands of the Everglades National Park. Florida, USA, February 2012.

Solvin Zankl / Snowflake magnified under microscope, Lilehammer, Norway

Alex Mustard / The eye of a Pacific giant octopus (Enteroctopus dofleini). Browning Pass, Vancouver Island, British Columbia, Canada

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

David Kjaer / Flock of Common Starling (Sturnus vulgaris) gathering before landing at winter roost, Salisbury Plain, Wiltshire, UK, January

Laurie Campbell / Common starling (Sturnus vulgaris) flock at dusk engaging in pre-roost display, Dumfries-shire, Scotland, March

Steve Gettle / Atreus Owl (Caligo atreus) butterfly wing with false eyespot, Ecuador

Ben Hall / 2020VISION / Cranesbill geranium (Geranium sp) flower, Montiagh's Moss, County Antrim, Northern Ireland, UK, June. Did you know? Geraniums are known as Cranesbills due to the shape of the fruit capsule.

John Cancalosi / Staurolite (iron aluminum silicate hydroxide), always crystallized often with two indivuals intergrown at right angles forming a cross. Sometimes used as amulets or ornaments. A fairly common metamorh...