Alex Mustard / A captive Zebra shark (Stegostoma fasciatum / varium) portrait, with diver behind, in Brighton Sealife Centre, Brighton, England, UK. Model released, not property released

Doug Perrine / Zebra / Leopard shark {Stegostoma fasciatum}. Malaysia

Fred Bavendam / Zebra Shark (Stegostoma fasciatum), Andaman Sea, Thailand

Pascal Kobeh / Zebra / Leopard shark (Stegostoma varium) swimming away from the bottom, New Caledonia, Pacific Ocean.

Pascal Kobeh / Zebra / Leopard shark (Stegostoma varium) swimming away from the bottom, New Caledonia, Pacific Ocean.

Jeff Rotman / Zebra Shark (Stegostoma fasciatum) underside showing mouth, teeth, barbels, ampullae of Lorenzini (natural electrical detectors located in the heads of sharks and rays which are sensitive to the elect...

Doug Perrine / Zebra shark (Stegostoma fasciatum) detail of lower jaw teeth used for crushing shells of molluscs and crustaceans, and for grasping small fish, Birch Aquarium, La Jolla, California, USA

Tony Wu / Zebra shark (Stegostoma fasciatum) lying on sandy bottom at a reef located in Wolverine Passage, part of the Barrier Reef of Papua New Guinea

Tony Wu / Zebra shark (Stegostoma fasciatum) swimming up from sandy bottom at a reef located in Wolverine Passage, part of the Barrier Reef of Papua New Guinea

Jordi Chias / Zebra / leopard shark (Stegostoma fasciatum) swimming over the reef, Vaavu atoll, Maldives, Indian Ocean

Pascal Kobeh / Close-up of a leopard shark or zebra shark (Stegostoma fasciatum) Maldives, Indian Ocean.

Aflo / Zebra shark (Stegostoma fasciatum) on sea floor, Maldives, September.

Morley Read / Timelapse of the summit of Cotopaxi Volcano (5,897m) after a heavy snowfall, showing vapour emanating from fumaroles, Ecuador, 2018. (non-ex)

Morley Read / Summit of Cotopaxi Volcano (5,897m) after a heavy snowfall, showing vapour emanating from fumaroles, Ecuador, 2018. (non-ex)

Danny Green / Reindeer (Rangifer tarandus), two standing on ridge in blizzard. Svalbard, Norway. April.

Danny Green / Reindeer (Rangifer tarandus) hunkering down in snow during blizzard. Svalbard, Norway, April.

Heather Angel / Giant panda (Ailuropoda melanoleuca) portrait, in falling snow. Captive bred, in enclosure, Panda Breeding Centre, Wolong, Sichuan Province, China. February 2008.

Morley Read / Timelapse of climbers making their way up to the summit of Cotopaxi Volcano (5897m) after a heavy snowfall, Cotopaxi, Ecuador, December 2018. (non-ex)

Marie Read / Snow buntings (Plectrophenax nivalis) flock in flight during a snowstorm, New York, USA, January.

Marie Read / Common redpoll (Carduelis flammea), male perched in alder (Alnus rugosa) during a snowstorm in winter, New York, USA, January.

Staffan Widstrand / Grey-headed woodpecker (Picus canus) on tree trunk in falling snow. Kalvtrask, Vasterbotten, Lapland, Sweden. January.

Jeff Foott / Mountains and river after autumn snowfall, Sunwapta River, Jasper National Park, Alberta, Canada

Jeff Foott / Mixed coniferous and deciduous forest after snowfall in autumn, Wells Gray Provincial Park, British Columbia, Canada

Jeff Foott / Waterfall after autumn snowfall, Tangle Creek Falls, Jasper National Park, Alberta, Canada