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Close-up of a weathered greenish grey rock face riddled with honeycomb-like hollows and thin ridges, between swirling folded layers, with a few orange spots. — Tafoni and alveoles Konstantinos Kourtidis

Aerial view of a saltmarsh at low tide, with a muddy brown channel meandering across a mottled surface of green, purple-grey and sandy patches and dark clumps of vegetation. — Low tide at the saltmarsh Lara Talavera

Sprinklers on tall poles spraying water over a grassy mountain slope, with a solar panel, hoses, rain gauges, tents and a boulder, and peaks above a sea of cloud behind. — Artifical rainfall experiment on a glacial moraine Fabian Maier

Narrow rocky ridge with a path along its crest leading to a peak, between steep green slopes, with a dark lake below on the left and distant hills in haze. — Glacial Legacy Rachel Hay

Five horses, brown and white, walking across a wide grassy steppe under a blue sky with thin white clouds, with a low ridge on the horizon. — Midsummer afternoon in the steppe Luca Belelli Marchesini

Steep rock face of thin pale siliceous layers bent into sharp zigzag chevron folds, partly covered in moss and grass, with a blue notebook resting on the rock for scale. — Chevron fold in siliceous rock Nannan Cheng

Stream rushing as a white blur over rounded pebbles into a clear green pool at the foot of a curving wall of steeply tilted, thinly layered grey rock. — Flowing Erosion of the Préalpes Fabio Crameri

Herd of cattle and a person walking along the crest of a grassy, eroded hillside under a clear blue sky, with bare scarps and trampled mud below. — Degraded pasture from Plopana Bacau, Eastern Romania Geanina Bireescu

View from above of a waterfall spilling in fine threads over a rounded, moss-covered rock into a dark pool, with ripples spreading across the water. — Bigar Waterfall-Romania Cristina Nicolaita

Close-up of a black moth with white wing spots and an orange band on its body, clinging to a dry stem above a stony riverbank with a river and green hills behind. — Insect Etienne Legeay

Underwater view of murky green water full of floating plant debris, leaf fragments and fuzzy red clumps of algae drifting above a pale sandy bottom. — Life in the surf zone Konstantinos Kourtidis

No-tilled wheat-cropped Vertic Leptosol Antonio Jordán

Cave wall covered with cream and pale brown flowstone, with a large white lobed formation jutting out like a clawed paw and smaller pointed formations below. — The claw, Lazaru Cave, Romania Vitalie Petra

Close-up of a dense mass of pale cream calcite crystals with sharp pointed tips, jumbled together and covering the whole frame. — Calcite Konstantinos Kourtidis

Hand holding a knife with a yellow and black handle, its blade lifting a thin crust of sandy soil bound together and hanging threads, above a dry grassy field. — Biocrusts on a former air field of the Technical University of Darmstadt Vincent Felde

Wetland of bright green cushion plants and golden grass threaded with winding pools of brown water, with a few white animals grazing in the distance. — Where Groundwater Threads Stitch Andean Bofedales Katrine Trottier

Calm greenish lagoon reflecting the dense green trees and reeds along its far bank, with dark tree shadows across the water in the foreground under a clear blue sky. — Artificial lagoon on an old restored quarry in the Green Corridor of Guadiamar, near the Doñana National Park Antonio Jordán

Village of flat-roofed houses, some with red and orange roofs, spread below a green hillside, with a grassy stony slope in front and bare mountains under a clear blue sky. — Iranian village in spring Hamid Darabi

Panorama of a mountain valley with green slopes below a large pale grey limestone peak on the left and red and grey layered hills on the right, under a clear blue sky. — Fold-and-Thrust belt Etienne Legeay

Flat field of bare brown soil covered with scattered straw and crop remains and small clumps, stretching back to a line of green trees under a cloudy sky. — Earthworm middens in a no-till agricultural system Victoria J. Burton

Aerial view of a vegetable plot in long parallel strips of green crops and purple cabbages, two rows covered in white fleece and one reddish strip, beside a grass track and a green field. — Organic Farming Kristof Van Oost

Dark saddled horse with a red tassel grazing on a green slope dotted with pale grey limestone outcrops, with grassy hills disappearing into mist. — Mountain Falakro Sokratis Nikoglou

Layered sedimentary rock formation with swirling patterns and a red-handled tool at the bottom. — Seismite in the Lisan Formation, pre Dead Sea lake deposits Shmulik Marco

Two polished rock slabs, each showing a dark black band next to an olive-green granular zone grading into white crystalline marble with dark grains. — Contact aureole between tonalitic melt and diopside marble, Precambrian basement of Estonia Sophie Graul

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