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Most viewed (90 days)

Most viewed (90 days)

7410 items

Person crouching over an open metal equipment case on dry steppe scattered with tufts of grass, with a long range of pinkish mountains and a band of cloud behind in evening light. — A lullaby for the datalogger Johannes Käufl

Night sky with stars above a dark mountain ridge, where a bright yellow-orange streak of light moves horizontally, and below it bands of red, green and blue light spread out like a spectrum. — Hessdalen lights Bjørn Gitle Hauge

Video of a steaming hot spring pool of vivid blue water with a white rim and orange mineral crust, set in pale ground with pine forest behind. — Not a swimming pool, but the deadly 'Celestine Pool' Jennifer Ziesch

Aerial view of a long straight rocky cliff and rift running across a mossy lava plain, beside a winding river, ponds, a road, car parks and a few buildings. — Aerial of Almannagja fissure, Thingvellir National Park, Iceland Ragnar Sigurdsson (arctic-images.com)

Tuft of pale grey-green lichen with flat, forked, antler-like branches resting in an open hand, against a blurred green background. — Evernia prunastri: tiny dancer in the forest breeze Antonio Jordán

Rocky desert hillside under a blue sky with red lines drawn on it, separating pale brown blocky rock marked A from bands of dark grey crumbly rock marked B. — Contact between Ortho-gneiss and Para-gneiss Metwally Hamza

Tree roots cling tightly to the rock, providing both physical support and access to scarce resources. Beyond anchoring the tree, roots explore the substrate for water and nutrients, allowing vegetation to survive even in challenging environments. — Holding on to the rock Antonio Jordán

Turquoise reservoir with a low water level and wide bare banks, crossed by a concrete footbridge to a water tower, with a white hilltop village and mountains behind. — Reservoir Symphony: reflections on Zahara-El Gastor reservoir (SW Spain) Antonio Jordán

Tall grey limestone pinnacles with fluted surfaces rising from bright red clay soil, topped by green shrubs and small trees under a cloudy sky. — Born to be red (How do Mediterranean red clayey soils form?) Antonio Jordán

Colourful hydrothermal pools and mineral deposits in the Dallol geothermal area of the Danakil Depression, Afar Region, Ethiopia. The vivid yellow, orange, red and green surfaces reflect the unusual mineral-rich hydrothermal environment created by geother — Colourful hydrothermal pools at Dallol, Ethiopia Alex Coleman

Close-up of a crumbly reddish-brown clay soil horizon broken into blocky lumps, dotted with white chalky nodules filling cracks and holes. — Calcium carbonate concretions in a soil horizon Antonio Jordán

Phone screenshot of a satellite view of brown, sparsely wooded hills covered with countless fine curving terrace lines that follow the slopes like contour lines. — Ancient Agricultural Terraces, Zagros Mountains near Shiraz, Southwestern Iran Hassan Baghbani

Aerial view looking straight down at a round crater holding pale milky blue water, beside the rocky brown shore of a lake of deeper turquoise water. — Volcano-Tectonic Interaction Nicolas Oestreicher

Person in a purple shirt with arms raised in a V beneath a wedge-shaped dropped block in a cliff of red-brown and cream layers, the layers offset along two faults that meet below. — A typical graben and horst Mohammad Goudarzi

Thin-section micrograph in vivid colours: sprays of fine needle-like sillimanite crystals in orange, red, blue and white radiating across a pale blue and grey background. — Sillimanite needles in a quartzite Sophie Graul

False-colour radar image of steep mountain terrain, with ridges and branching valleys outlined in bands of magenta, yellow, green and cyan, and grey glacier tongues. — Among the Artefacts of Atmosphere Gwendolyn Dasser

Frozen, snow-covered crater lake ringed by jagged dark mountains streaked with snow, seen between rocky slopes under a grey sky. — Tianchi covered by snow, from the northern slope of Changbai Mountain, China Haibo Liu

Forested hillside in autumn colours of orange, red, yellow and green above a sloping green meadow, under a blue sky with white clouds and a contrail. — Temperate deciduous forest in the Swiss Jura mountains Yann Vitasse

Wide field of sand dunes with curved crests and long shadows, scattered with small tufts of dry grass. A tiny tent, an umbrella and a person sit in the hollow between the dunes, with tracks crossing the sand. — Desert life and landforms in the Gobi desert Jana Eichel

Green mountain valley with a pale river winding past a dark conifer forest and a rocky grey cliff on the right, with a road cut into the hillside and layered blue ridges in the distance. — Altai region, river valley Ekaterina Kulakova

Soil phases Antonio Jordán

Aerial view of a small dark volcanic island with two steep cones and a pointed gravel spit, ringed by white surf in a turquoise sea. — Aerial of Surtsey Island, Iceland Ragnar Sigurdsson (arctic-images.com)

Smiling child holding up both hands stained bright orange-red with clay, with smears of it on one cheek, in front of a blurred green and red-earth background. — A mini-experiment by a mini-scientist Antonio Jordán

Narrow slot canyon with smooth, wavy orange rock walls in fine layers, opening to a bright white sky above and a sandy floor with sunlit puddles. — Las Grietas: Miniature Canyons of Lanzarote Harald Crepaz

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