Guest from the Lindblad Expedition ship National Geographic Explorer holding up a block of ice in the Svalbard Archipelago, Norway, Arctic, Europe

El Misti and Chachani volcanoes seen from salt flats of Salinas y Aguada Blanca National Reserve, Arequipa Region, Peru, South America

Guests from the Lindblad Expedition ship National Geographic Explorer lay in the relatively warm waters of the caldera at Deception Island, South Shetland Islands, Antarctica

Guests from the Lindblad Expedition ship National Geographic Explorer lay in the relatively warm waters of the caldera at Deception Island, South Shetland Islands, Antarctica

Guests from the Lindblad Expedition ship National Geographic Explorer lay in the relatively warm waters of the caldera at Deception Island, South Shetland Islands, Antarctica

Space weather observation satellites, artwork

Earth's Geoid

A young female hiker poses for a portrait on the edge of a stunning waterfall valley known as Haifoss, in Southern Iceland, Iceland

A few weeks after the start of the summer campaign, the winterers who have just spent 14 months at Concordia return home. They take off from Concordia station aboard the Basler;photo), bound for Mario Zucchelli or Dumont d'Urville. Most of them make a sign indicating the village or town where they live, and the distance to Concordia. Concordia Antarctic Base

Volcanic underwater bottoms. True seamounts can be seen in the image, a natural monument made of basaltic columns called a columnar disjunction. The highest point is about 15 meters below the surface of the Atlantic Ocean and drops vertically to more than 40 meters at its deepest point. The place is known as La Rapadura on the coast of Santa Úrsula, north of the island of Tenerife. Seabed of the Canary Islands.

Volcanic underwater bottoms. True seamounts can be seen in the image, a natural monument made of basaltic columns called a columnar disjunction. The highest point is about 15 meters below the surface of the Atlantic Ocean and drops vertically to more than 40 meters at its deepest point. The place is known as La Rapadura on the coast of Santa Úrsula, north of the island of Tenerife. Seabed of the Canary Islands.

Volcanic underwater beds, Tenerife. The image shows the top of an underwater mountain formed by basaltic columns;columnar disjunction. Canary Islands.

Underwater canyon, Marsa Bareika reef. Ras Muhammad National Park;Sharm Al Sheikh - Raas Mohammed). Sinai Peninsula. Red Sea, Egypt.

The expeditionaries bound for Cap Prud'Homme and Dumont d'Urville, in front of the Basler that will take them there. It's worth noting that some of them are wearing the blue garment normally worn for Concordia: this is because it's warmer and contains more down, which is no luxury at the start of the summer season. A matter of habit and personal preference. The buildings of the Mario Zucchelli base can be seen in the background. Terra Nova Bay, Victoria Land, Antarctica

The Basler, stationed on the Terra Nova Bay ice floe in front of the Mario Zucchelli base. The mechanics take advantage of a rare lull to carry out routine maintenance. The aircraft is strapped to the ground. A squall arrives from the left. Victoria Land, Antarctica

A German BGR helicopter used in Terre Victoria to transport geologists to specific research points. These are one-off scientific programs, involving the collaboration of several countries, in this case Germany and Italy. The Germans set up a base camp several dozen kilometers from the Italian Mario Zucchelli station, using Italian logistical resources such as the Laura Bassi icebreaker to transport the helicopter, the equipment needed to set up the base camp, scientific equipment and, of course, personnel. All of this was delivered to the Mario Zucchelli station for onward transport by helicopter to the search site. Victoria Land, Antarctica

A Lockheed C-130 Hercules on loan from the Italian Air Force for logistics operations between Christchurch;New Zealand) and the Mario Zucchelli base. Although military activities are strictly forbidden in Antarctic territory by the Treaty of Madrid, polar-operating countries frequently use the skills and equipment of their armies for polar logistics. Victoria Land, Antarctica

The Lockheed C-130 Hercules prepares to take off from the runway built on the sea ice in Terra Nova Bay, where the Mario Zucchelli station is located. Victoria Land, Antarctica

(Clione limacina), known as the naked sea butterfly, sea angel is a pelagic sea slug, only few centimeters in length, swim in front of an iceberg, Tasiilaq, East Greenland

Split image of scuba divers before to dive under the ice, only in springtime, when the hard winter slowly subsides, are the ice-cold waters suitable for divers who can dive around a iceberg that floats in crystal-clear water, Tasiilaq, East Greenland

Only in springtime, when the hard winter slowly subsides, are the ice-cold waters suitable for divers who can dive around a iceberg that floats in crystal-clear water, Tasiilaq, East Greenland

Spit image of a scuba diver diving close to an iceberg, only in springtime, when the hard winter slowly subsides, are the ice-cold waters suitable for divers who can dive around a iceberg that floats in crystal-clear water, Tasiilaq, East Greenland

A tiny Benthic Hydromedusa, with a bell size of less than one centimeter, (Ptychogastria polaris), swimming in front of an iceberg, Tasiilaq, East Greenland

Only in springtime, when the hard winter slowly subsides, are the ice-cold waters suitable for divers who can dive around a iceberg that floats in crystal-clear water, Tasiilaq, East Greenland

(Saccharina latissima), laminaria, a genus of 31 species of brown algae commonly called kelp with some anemones covering a wall close to an iceberg, Tasiilaq, East Greenland

(Mnemiopsis leidyi), the warty comb jelly or sea walnut. Only in springtime, when the hard winter slowly subsides, are the ice-cold waters suitable for divers who can dive around a iceberg that floats in crystal-clear water, Tasiilaq, East Greenland

Only in springtime, when the hard winter slowly subsides, are the ice-cold waters suitable for divers who can dive around a iceberg that floats in crystal-clear water, Tasiilaq, East Greenland

(Saccharina latissima), laminaria, a genus of 31 species of brown algae commonly called kelp covering a wall close to an iceberg with scuba diver silhouette, Tasiilaq, East Greenland

Split image of guide with snowmobile waiting the divers, only in springtime, when the hard winter slowly subsides, are the ice-cold waters suitable for divers who can dive around a iceberg that floats in crystal-clear water, Tasiilaq, East Greenland

A tiny Benthic Hydromedusa, with a bell size of less than one centimeter, (Ptychogastria polaris), swimming in front of an iceberg, Tasiilaq, East Greenland

(Mnemiopsis leidyi), the warty comb jelly or sea walnut. Only in springtime, when the hard winter slowly subsides, are the ice-cold waters suitable for divers who can dive around a iceberg that floats in crystal-clear water, Tasiilaq, East Greenland

Landscape of Svalbard in Norway, also known as Spitsbergen. This territory stretches from latitude 75 to 80 degrees to the pack ice a few hundred kilometers from the North Pole. Melting ice, early global warming. Front of a glacier fracturing at the edge of a fjord. Explorers' sailboat at the ice edge

Landscape of Svalbard in Norway, also known as Spitsbergen. This territory stretches from latitude 75 to 80 degrees to the pack ice a few hundred kilometers from the North Pole. Melting ice, premature global warming. Exploration boat in Madeleine Bay. Young explorer on deck.

Landscape of Svalbard in Norway, also known as Spitsbergen. This territory stretches from latitude 75 to 80 degrees to the pack ice a few hundred kilometers from the North Pole. Melting ice, premature global warming. Exploration boat in Magdalen Bay. Explorer sailboat.

Landscape of Svalbard in Norway, also known as Spitsbergen. This territory stretches from latitude 75 to 80 degrees to the pack ice a few hundred kilometers from the North Pole. Melting ice, premature global warming. Exploration boat in Baie de la Madeleine.

Landscape of Svalbard in Norway, also known as Spitsbergen. This territory stretches from latitude 75 to 80 degrees to the pack ice a few hundred kilometers from the North Pole. Melting ice, early global warming. Front of a glacier fracturing at the edge of a fjord.

Cave diver in an underwater cave of karstic origin at a depth of 75 meters during the Gumbo La Baharini 2 expedition, which aimed to produce a complete 3D model of this karstic cave using photogrammetry. Passe Bateau Sud, Mayotte lagoon

Potholing diver in a karstic cave at Passe Bateau Sud, 60 metres deep in Mayotte's lagoon.

Cave diver in a karst underwater cave at a depth of 60 metres for the Gumbo La Baharini 2 expedition, Passe Bateau Sud at a depth of 60 metres, Mayotte

Tek rebreather diver at a depth of 70 meters with a DPV specially equipped with 60,000 lumen lighting and 12 Gopro to carry out a 3D survey of a karstic cave submerged for over 14,000 years, Passe Bateau Sud, Mayotte Lagoon

Scuba divers diving around the underwater part of a iceberg, Antarctic Peninsula, Antarctica

Speleologist diver taking photographs in a karstic cave at Passe Bateau Sud at a depth of 60 metres, Mayotte

Tek (Trimix) speleologist diver in a karstic underwater cave over 70 meters deep, Photogrammetry, twiglight zone, Mayotte

Passangers walking in the snow at Neko Harbour. Cruise on board Exploris One. Antarctic.

Kayak at the bottom of Scoresbysund, North East Greenland

Nudibranch (Dendronotus robusta) on brown algae commonly called kelp Tasiilaq, East Greenland

Laminaria (Saccharina latissima), a genus of 31 species of brown algae commonly called kelp in front of an iceberg, Tasiilaq, East Greenland

Laminaria (Saccharina latissima), a genus of 31 species of brown algae commonly called kelp in front of an iceberg with scuba diver, Tasiilaq, East Greenland

Laminaria (Saccharina latissima), a genus of 31 species of brown algae commonly called kelp in front of an iceberg, Tasiilaq, East Greenland

Only in springtime, when the hard winter slowly subsides, are the ice-cold waters suitable for divers who can dive around a iceberg that floats in crystal-clear water, Tasiilaq, East Greenland

(Dendronotus robusta) nudibranch on brown algae commonly called kelp in front of an iceberg, Tasiilaq, East Greenland

A tiny Benthic Hydromedusa, with a bell size of less than one centimeter, (Ptychogastria polaris), swimming in front of an iceberg, Tasiilaq, East Greenland

Only in springtime, when the hard winter slowly subsides, are the ice-cold waters suitable for divers who can dive around a iceberg that floats in crystal-clear water, Tasiilaq, East Greenland

Arctic comb jelly or sea nut (Mertensia ovum) swimming in front of an iceberg, Tasiilaq, East Greenland

Kayaking in Scoresbysund, North East Greenland

Only in springtime, when the hard winter slowly subsides, are the ice-cold waters suitable for divers who can dive around a iceberg that floats in crystal-clear water, Tasiilaq, East Greenland

Sailboat passing in Scoresbysund, North East Greenland

Only in springtime, when the hard winter slowly subsides, are the ice-cold waters suitable for divers who can dive around a iceberg that floats in crystal-clear water, Tasiilaq, East Greenland