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Every photo starts as a negative.

Let X be any place worth raising a camera for. Here are the solutions found so far.

Browse the proofsExplore the map
Baby Sumatran elephant standing between the legs of an adult elephantQ.E.C. stands for Quod erat capturandum, “which was to be captured”: a play on Q.E.D., the Quod erat demonstrandum that closes a mathematical proof. n is the number of frames published so far.

Zoo Aquarium de Madrid

Latest proofs

Every place belongs to at least one set.

Browse by what you came to see. Some places refuse to pick just one.
AquaFaunaPetraZoo Aquarium de…Xagó BeachSalamancaCoentral das BarreirasArgaloPraia da RainhaParque Biológico da…

No map pins. Just points.

Every proof plotted by longitude and latitude.
10°W9°W8°W7°W6°W5°W4°W3°W38°N39°N40°N41°N42°N43°N44°N45°NZoo Aquarium de…Xagó BeachSalamancaCoentral das BarreirasParque Biológico da…ArgaloPraia da Rainhacentroid

Coordinates in decimal degrees (WGS 84). Tap any of them to open it on OpenStreetMap.

Every frame, numbered.

Each frame keeps its own code: proof, then frame.
Flock of flamingos wading in a pond under trees, pink reflections on the water37723-4966Two bright pink flamingos in profile on a lawn, one with its hooked bill turned towards the camera37723-5564Pelican floating on dark green water with its long bill resting on its chest37723-4486Spotted seal gliding underwater past green algae, front flipper spread37723-7696African penguin in profile against blue water and pale stepping stones37723-3812Group of African penguins standing on artificial grass among pale rocks37723-1113Sea lion sitting upright on a ledge by the pool, head raised to the sky37723-9208Sea lion surfacing in green water and throwing up a burst of spray37723-6409Indian rhinoceros with folded, armour-like skin sticking out a pink tongue37723-4363White rhinoceros in dappled shade with two horns and a wide, square lip resting on a rock, a second rhino behind37723-8759Red panda resting in a tree, half hidden behind bright green leaves37723-2727Capuchin monkey with a dark cap of fur sitting in the sun, looking straight at the camera37723-1393

Field notes that follow from the photos.