MYN / Gil Wizen / Israeli sand cockroach (Heterogamodes hebraica) composite showing ventral and dorsal view of female, Central Coastal Plain, Israel, April. Focus-stacked. meetyourneighbours.net project

Gavin Hellier / Aerial view tracking in reverse along the chalk cliffs near Old Harry Rocks, Dorset, England, UK, June 2017. Hellier

Gavin Hellier / Aerial view tracking in reverse along the chalk cliffs near Old Harry Rocks, Dorset, England, UK, June 2017. Hellier

Graham Eaton / Small thrust fault in Ordovician age sedimentary rocks - geological feature caused by horizontal compression of rock layers, resulting in a low angle reverse fault. Cilan Head, Abersoch, Wales, UK. De...

Nick Upton / Reverse side of Swift tower with nest boxes for up to 100 pairs of Common swifts (Apus apus) designed as a public art work to look like a setting sun on the front side, Logan's Meadow Local Nature Res...

Nick Upton / Reverse side of Swift tower with nest boxes for up to 100 pairs of Common swifts (Apus apus) designed as a public art work to look like a setting sun on the front side, Logan's Meadow Local Nature Res...

Nick Upton / Reverse side of Swift tower with nest boxes for up to 100 pairs of Common swifts (Apus apus) designed as a public art work to look like a setting sun on the front side, Logan's Meadow Local Nature Res...

SCOTLAND: The Big Picture / Forest regeneration in Carrifran. Trees planted to reverse environmental degradation. Part of Carrifran Wildwood, an initiative led by the Borders Forest Trust, Moffat Hills, Scotland, UK, November 20...

SCOTLAND: The Big Picture / Carrifran, a 1600 acre ice carved valley, replanted to reverse environmental degradation. Part of Carrifran Wildwood, a replanting initiative led by the Borders Forest Trust, Moffat Hills, Scotland, U...

SCOTLAND: The Big Picture / Carrifran, a 1600 acre ice carved valley, replanted to reverse environmental degradation. Part of Carrifran Wildwood, a replanting initiative led by the Borders Forest Trust, Moffat Hills, Scotland, U...

Charlie Summers / The Witch Head Nebula, IC 2118. If you reverse the image 180 degrees, you can readily see the profile of the witch, not so recognizable upside down. This is the correct orientation as seen from East...

Tony Wu / Humpback whale (Megaptera novaeangliae) female executing a reverse tail slap, with dorsal surface hitting the surface of the ocean, Vava'u, Tonga, South Pacific

Tony Wu / Humpback whale (Megaptera novaeangliae) female executing a reverse tail slap, with dorsal surface hitting the surface of the ocean, Vava'u, Tonga, South Pacific

Tony Wu / Humpback whale (Megaptera novaeangliae) adult female executing a reverse tail slap, with dorsal surface hitting the surface of the ocean, Vava'u, Tonga, South Pacific

Alex Mustard / Copepods (Calanus finmarchicus) aggregated at the surface (reverse diel migration) providing a food source for Basking sharks, Cairns Of Coll, Isle of Coll, Inner Hebrides, Scotland, UK, North East At...

John Cancalosi / Western grey kangaroos {Macropus fuliginosus} mating, South Australia Note - In captivity western males may produce hybrids from eastern females (never in reverse)

Pete Cairns / Orange mesh attached to deer fence to increase visibility and reduce fence collisions of Capercaillie and Black grouse - a common cause of their fatality. This method is used throughout Scotland to t...

Pete Cairns / Orange mesh attached to deer fence to increase visibility and reduce fence collisions of Capercaillie and Black grouse - a common cause of their fatality. This method is used throughout Scotland to t...

Tui De Roy / Red-footed Booby (Sula sula) white morph represents only five percent of the Galapagos population but is reverse elsewhere, Genovesa Tower Island, Galapagos Islands, Ecuador

Roberto Rinaldi / Men sailing a popow, the traditional outrigger canoe used on Yap, Micronesia. ^^^The popow is characterized by v shaped ends, used for travel and fishing. The popows are designed so that the mast can...

Roberto Rinaldi / Men sailing a popow, the traditional outrigger canoe used on Yap, Micronesia. ^^^The popow is characterized by v shaped ends, used for travel and fishing. The popows are designed so that the mast can...

Roberto Rinaldi / Men sailing a popow, the traditional outrigger canoe used on Yap, Micronesia. ^^^The popow is characterized by v shaped ends, used for travel and fishing. The popows are designed so that the mast can...

Roberto Rinaldi / Men sailing a popow, the traditional outrigger canoe used on Yap, Micronesia. ^^^The popow is characterized by v shaped ends, used for travel and fishing. The popows are designed so that the mast can...

Roberto Rinaldi / Man sailing a popow, the traditional outrigger canoe used on Yap, Micronesia. ^^^The popow is characterized by v shaped ends, used for travel and fishing. The popows are designed so that the mast can...

Roberto Rinaldi / Men sailing a popow, the traditional outrigger canoe used on Yap, Micronesia. ^^^The popow is characterized by v shaped ends, used for travel and fishing. The popows are designed so that the mast can...

Roberto Rinaldi / Men on a traditional outrigger canoe, the popow, Yap, Micronesia. The Popow is characterized by V shaped ends. They are designed so that the mast can be moved from one end to the other to reverse the...

Roberto Rinaldi / Men on a traditional outrigger canoe, the popow, Yap, Micronesia. The Popow is characterized by V shaped ends. They are designed so that the mast can be moved from one end to the other to reverse the...

Roberto Rinaldi / Men sailing a popow, the traditional outrigger canoe used on Yap, Micronesia. ^^^The popow is characterized by v shaped ends, used for travel and fishing. The popows are designed so that the mast can...

Roberto Rinaldi / Men sailing a popow, the traditional outrigger canoe used on Yap. The popow is characterized by v shaped ends, and is used for travel and fishing. The popows are designed so that the mast can be moved...

Roberto Rinaldi / Men sailing a popow, the traditional outrigger canoe used on Yap, Micronesia. ^^^The popow is characterized by v shaped ends, used for travel and fishing. The popows are designed so that the mast can...

Roberto Rinaldi / Men sailing a popow, the traditional outrigger canoe used on Yap, Micronesia. ^^^The popow is characterized by v shaped ends, used for travel and fishing. The popows are designed so that the mast can...

Roberto Rinaldi / Men sailing a popow, the traditional outrigger canoe used on Yap, Micronesia. ^^^The popow is characterized by v shaped ends, used for travel and fishing. The popows are designed so that the mast can...

Roberto Rinaldi / Men poling a popow, the traditional outrigger canoe used on Yap, Micronesia, with one man in the water. ^^^It is characterized by v shaped ends, used for travel and fishing. The popows are designed so...

Roberto Rinaldi / Men sailing a popow, the traditional outrigger canoe used on Yap, Micronesia. The popow is characterized by v shaped ends, used for travel and fishing. The popows are designed so that the mast can be...

Roberto Rinaldi / Men sailing a popow, the traditional outrigger canoe used on Yap, Micronesia. ^^^The popow is characterized by v shaped ends, used for travel and fishing. The popows are designed so that the mast can...

Tony Wu / Adult female Humpback whale (Megaptera novaeangliae) executing reverse tail slap, part of extended play with her calf, which was executing tail slaps and breaching. South Pacific ocean, Tonga.

John Cancalosi / Corn snake (Pantherophis guttatus) hatching, Reverse (albino) Okeetee morph, created through captive breeding

Doug Gimesy / Researcher Ida Lundback (right), with the assistance of volunteer Naomi Wells (left), prepares to take a faecal sample from a captured Little Blue Penguin (Eudyptula minor) before returning it back to...

Doug Gimesy / Education officer Jane Horgan, from Cheetah Conservation Botswana (CCB), talking to children attending their bush camp in the Kalahari - 30km outside Ghanzi - about where Cheetahs (Acinonyx jubatus) m...