Danny Green / 2020VISION / Grey seals (Halichoerus grypus) two adults fighting in the surf, Donna Nook, Lincolnshire, England, UK, October. Photographer quote: "Sex and violence – grey seals are good at both! These two adolesce...

Doug Gimesy / Rescued and rehabilitated Grey-headed flying-foxes (Pteropus poliocephalus) that have been transported from their rehabilitation facility await to be to taken out of the car transferred to there &apos...

Ashley Cooper / Tourists on beach with Mountain peaks on Joinville Island, Antarctic Peninsula.

Ashley Cooper / Soil turned to dust and Almond groves chopped down as there is no longer water available to irrigate them during 2012-2017 California drought, Wasco, California, USA, September 2014.

Ashley Cooper / Almond groves being chopped down as there is no longer water available to irrigate them, in Wasco, California, USA, September 2014.

Ashley Cooper / Almond (Prunus amygdalus) groves chopped down as there is no longer water available to irrigate them during the 2011-17 California drought. Wasco, Central Valley, California, USA, September 2014

Jen Guyton / White-backed vultures (Gyps africanus) and spotted hyenas (Crocuta crocuta) squabble over the drying and deflated skin of an elephant carcass (Loxodonta africana), Laikipia Plateau, Kenya. The hyenas...

Juergen Freund / Researcher Guido Westhoff's Faraday shield aiming to find out if sea snake tail has light receptors - using anesthesized Shaw's Sea Snake (Lapemis curtus) specimen. The faraday shield is used for shie...

Juergen Freund / Guido Westhoff blowing air into anesthesized Shaw's Sea Snake (Lapemis curtus). He uses a Faraday shield to find out if sea snake tail has light receptors. The Faraday shield is used for shielding off...

Juergen Freund / Guido Westhoff with a Faraday shield. He uses this contraption to find out if sea snake tail has light receptors. The Faraday shield is used for shielding off noise. The electrodes and a light source...

Paul D Stewart / Woodcut illustration of Wolverine (Gulo gulo) or Glutton, squeezing between trees to defecate before resuming feeding. From Conrad Gesner's 'Icones Animalium' published by Christof Froschover, Zurich,...

Orsolya Haarberg / Levada in Folhadal. A levada is an irrigation channel or aqueduct specific to the Portuguese Atlantic region of Madeira. In Madeira, the levadas originated out of the necessity of bringing large amoun...