Alex Mustard / A diver swimming through the Silfra fissure, a crack in the Earth's crust between the North American and Eurasian continental plates, which is filled with glacial melt water. In this photo the Am...

Emanuele Biggi / Close-up of Strinati's cave salamander's (Speleomantes strinatii) eye, San Bartolomeo di Savignone, Italy

Emanuele Biggi / Strinati's cave salamander (Speleomantes strinatii) climbing up rock near entrance in cave, Genova, Italy.

Terry Whittaker / Arctic fox (Vulpes lagopus) blue colour morph in summer coat, feeding on Kelp fly (Coelopa sp.) larvae along the coast, Hornvik, Hornstrandir, Westfjords, Iceland. July.

Terry Whittaker / Rock formation and waterfall, Hornvik, Hornstrandir, Westfjords, Iceland. July, 2022.

Terry Whittaker / Heath spotted orchid (Dactylorhiza maculata) in flower, Hornvik, Hornstrandir, Iceland. July.

Terry Whittaker / Wood cranesbill (Geranium sylvaticum) and Meadow buttercup (Ranunculus acris) in flower on hillside with lake and mountains in background, Hornvík, Hornstrandir, Iceland. July.

Terry Whittaker / Arctic fox (Vulpes lagopus) male, blue colour morph in winter coat, standing on snow, Hornstrandir, Iceland. February.

Terry Whittaker / Arctic fox (Vulpes lagopus) scat comprised entirely of beetle and insect cases, Hornvik, Hornstrandir, Iceland. July.

Terry Whittaker / Redwing (Turdus iliacus) fledgling perched on Angelica (Angelica archangelica) stem, Hornvik, Hornstrandir, Iceland. July.

Terry Whittaker / Arctic fox (Vulpes lagopus) male, blue colour morph in winter coat, crossing stream on beach, Hornstrandir, Iceland. February.

Terry Whittaker / Arctic fox (Vulpes lagopus) male, blue colour morph in winter coat, looking for food on a picnic table outside tourist lodge, Hornstrandir, Iceland. February.