99 Fun Facts About Continents and Oceans

On a Mercator map Greenland looks as big as Africa; in reality Africa is about how many times larger?

Africa is about 14 times as large as Greenland, yet Mercator's 1569 projection stretches the far north until the two look equal on the page.

What lies directly beneath the geographic North Pole, which unlike the South Pole sits on no continent?

Sea ice over deep water is all there is: the ocean under the pole is more than 4,000 m deep and the ice above it never stops drifting, which is why no permanent station can stand there.

Which Pacific nation skipped 30 December 2011 entirely, hopping west across the date line toward its trading partners?

Samoa was undoing an old switch: 119 years earlier it had moved to the American side of the date line to help trade with the United States, long before its main partners lay to the west.

Which country stretches across five geographical time zones yet officially keeps just one, set to its capital?

China runs on Beijing time from the coast to its western border, so far-western Xinjiang keeps an unofficial clock of its own, two hours behind, and people there use both.

Which island pair between Siberia and Alaska, one Russian and one American, sits 3.8 km apart across the date line?

The Diomede Islands are nicknamed Tomorrow Island and Yesterday Island, because the date line between them puts Big Diomede almost a full day ahead of its neighbour.

Ceuta and Melilla, two autonomous cities on Morocco's northern coast, belong to which European country?

Spain got Ceuta from Portugal: it was the one city of the Portuguese empire to side with Madrid when Portugal broke away in 1640, and Lisbon ceded it in 1668.

Which island nation joined the European Union in 2004 even though it lies geographically in West Asia, off the Levant?

Cyprus joined as a divided island: the whole of it counts as EU territory, but EU law is suspended in the north, where the government in Nicosia has no control.

Which country is the only one in Asia whose land the equator crosses?

Indonesia is crossed on Sumatra and Borneo, where the city of Pontianak marks the line with a monument; at the equinoxes the noon sun stands overhead and shadows there vanish for a moment.

Which German meteorologist set out the theory of continental drift in a 1912 lecture, decades before geologists accepted it?

Alfred Wegener was dismissed by leading geologists as an outsider, a mere weatherman; he died on a Greenland expedition in 1930, and his idea only won out in the 1960s.

Which society recognised the Southern Ocean as a fifth ocean in 2021?

The National Geographic Society made the change on World Oceans Day, reasoning that the swift current circling Antarctica keeps those waters distinct: an ocean defined by a current, not by land.

Hawaii is a US state, but which island region of the Pacific does it share with Tahiti and Easter Island?

Polynesia reaches Hawaii because its first settlers were Polynesian voyagers, who arrived centuries before any European; the islands form the northern corner of the Polynesian Triangle.

The Arctic takes its name from the Greek arktos, meaning which animal, after the constellation of the same name?

Bear is the meaning of arktos: the Greeks named the north for the Bear, the constellation that circles the pole, and the Antarctic is simply the region opposite it.

Which dark volcanic rock, erupted along mid-ocean ridges, makes up most of the ocean floor's crust?

Basalt forms the crustal part of every oceanic plate as mantle wells up beneath the ridges, while the continents ride higher on lighter granitic rock.

Which Arctic sea lane through Canada's island maze links the Atlantic and Pacific, first transited by ship in 1906?

The Northwest Passage had wrecked lavish expeditions, Sir John Franklin's of 1845 among them, before Roald Amundsen got through in a small sloop with a crew of six, taking three years.

Which warm ocean current do the sea turtles ride like a highway in Finding Nemo?

The East Australian Current really does sweep tropical fish from the Great Barrier Reef to Sydney Harbour each summer, though nowhere near as fast as the film's turtles ride it.

Which range is still rising because the Indian plate keeps pushing into the Eurasian plate?

The Himalayas carry the proof of their origin: the rock at the very top of Everest is limestone full of sea-floor fossils, lifted more than 8 km as India ploughed into Asia.

Africa is joined to Eurasia, making Earth's largest landmass, only by which narrow neck of land, cut by a canal in 1869?

The Isthmus of Suez makes Africa, Europe and Asia a single landmass, home to about 86% of humanity; the canal dug across it spares ships the long voyage around Africa.

Which strait carries the Europe–Asia line south from the Sea of Marmara to the Aegean, past the Gallipoli peninsula?

The Dardanelles was the ancient Hellespont: Xerxes had it bridged with boats so his army could march into Greece, and in 1810 Lord Byron swam across it from Europe to Asia.

What is the name of the 3% of Turkey that lies in Europe, west of the Turkish Straits?

East Thrace is just 3% of Turkey's land but home to more than a tenth of its people, because it takes in the European side of Istanbul, the country's largest city.

Which faunal boundary, drawn in 1859 between Bali and Lombok, splits Asian wildlife from the Australian realm?

The Wallace Line runs between Bali and Lombok through a strait only a few dozen kilometres wide, yet so deep that it stayed open water even when ice-age seas fell, so few land animals ever crossed.

Which 145 km gap between Italy's largest island and Tunisia splits the Mediterranean into western and eastern basins?

The Strait of Sicily hides a restless volcano: in 1831 it broke the surface as a new island, four powers disputed who owned it, and within six months the sea had washed it away.

Which Arctic country's mainland lies wholly south of the Arctic Circle, which crosses only one of its small offshore islands?

Iceland touches the Arctic Circle only at Grímsey, an island 40 km off its north coast, yet that sliver makes it one of the eight countries with land inside the line.

Which vanished Mesozoic sea, named by Eduard Suess in 1893 after a Greek goddess, was crushed between colliding plates?

The Tethys Ocean takes its name from the sister and consort of Oceanus; it was squeezed shut between colliding plates, throwing up the Alpide belt of mountains.

Which small Permian reptile, fossilised in Brazil, Uruguay and southern Africa, became evidence for continental drift?

Mesosaurus looked rather like a small crocodile and kept to inland waters; a creature like that could never have crossed an ocean, so the same fossils on both shores meant the lands were once joined.

The Atlantic widens at the Mid-Atlantic Ridge, carrying the Americas away from Europe and Africa at roughly what rate each year?

About 2.5 cm a year sounds trivial, but it adds up to 25 km every million years, enough over 100 to 200 million years to turn a narrow inlet into the Atlantic.

Which plate-tectonic process explains why almost no ocean floor is older than 200 million years, while continental rocks reach four billion?

Subduction sinks old, dense sea floor back into the mantle at the ocean trenches, while lighter continental rock stays afloat and keeps its ancient record.

Which continent drifts north about 7 cm a year, so its official map coordinates were shifted 1.8 m in 2017?

Australia had crept about 1.5 m since its map grid was last fixed in 1994, enough to trip up satellite navigation, so the 1.8 m correction deliberately overshot to stay accurate until 2020.

Which island nation erased 31 December 1994 from its eastern atolls' calendar so that all its atolls would share one date?

Kiribati had been cut in two by the date line, its two sides sharing only four working days a week; the fix also made its Line Islands the first land to greet the year 2000.

The Amundsen–Scott station at the South Pole, where every time zone meets, keeps the clocks of which country?

New Zealand time rules there because the station's main supply base is Christchurch, and McMurdo on the coast keeps the same clocks.

Mean sea level at the Panama Canal's Pacific end sits roughly how much higher than at its Atlantic end?

About 20 cm of extra height comes from the Pacific's less dense water and prevailing weather, though the canal's locks exist to climb the hills between, not to bridge that step.

Which US state holds Triple Divide Peak, whose rain can reach the Pacific, the Gulf of Mexico or Hudson Bay?

Montana's Triple Divide Peak, in Glacier National Park, stands where two continental divides meet, so its three slopes send rain towards three different seas.

Which sea is the only one on Earth with no land boundary, hemmed in by ocean currents instead of coasts?

The Sargasso Sea is defined only by the currents circling it, which trap great mats of floating sargassum weed; eels from both Europe and North America cross the Atlantic to spawn there.

Which Arctic sea off Norway and Russia, once the Murman Sea, is named for a Dutch navigator?

The Barents Sea honours Willem Barentsz, and its southern half around Murmansk stays ice-free all year thanks to warm water arriving from the Atlantic.

Which strait, about 700 m wide at its tightest, is the world's narrowest used for international shipping?

The Bosporus is narrow enough that three bridges, a rail tunnel and a road tunnel now cross it, joining Europe to Asia and tying the two halves of Istanbul together.

Which cold flow carries Greenland's icebergs south past Newfoundland into the shipping lanes each spring?

The Labrador Current meets the warm Gulf Stream near Nova Scotia, breeding the heavy fogs and rich fishing grounds of the Grand Banks.

In which ocean do the surface currents north of 30°S reverse direction every winter as the monsoon winds turn?

The Indian Ocean is the only one whose circulation flips with the seasons, and sailors were riding its monsoons between Arabia, Africa and India long before a Greek guide of the 1st century wrote the trick down.

Which Arctic sea north of Alaska and the Yukon is named for the admiral behind the wind-force scale?

The Beaufort Sea honours Sir Francis Beaufort, the navy hydrographer whose search for a naturalist to sail on HMS Beagle led to the invitation to a young Charles Darwin.

Which sea, linked to the Black Sea by the Strait of Kerch, is the world's shallowest at just 14 m deep?

The Sea of Azov is nowhere deeper than about 14 m, and the Don and Kuban rivers pour in so much fresh water and silt that it is barely salty and freezes easily in winter.

What is the belt around Antarctica, roughly 48°S to 61°S, where cold polar water sinks beneath warmer seas called?

The Antarctic Convergence can be felt as well as mapped: within a few dozen kilometres the sea turns sharply colder, and the mixing waters concentrate nutrients that feed a great abundance of sea life.

Which supercontinent, assembled over a billion years ago and named from the Russian for 'motherland', predates Pangaea?

Rodinia came together 1.26–0.90 billion years ago and broke apart 750–633 million years ago, its fragments later regrouping as Pannotia and then Pangaea.

Which great Russian river never reaches an ocean, emptying instead into the landlocked Caspian Sea?

The Volga ends in the Caspian, 28 m below sea level, where its water can leave only by evaporating; about 18% of Earth's land drains into closed basins like this one.

Which Pacific trench holds Challenger Deep, the deepest known point in any ocean, nearly 11 km below the waves?

The Mariana Trench is so deep that Mount Everest, set on its floor, would still be covered by more than 2 km of water; Victor Vescovo piloted a submersible to the bottom in 2019.

Which South American country holds the lowest land in the Americas, a salt lake 105 m below sea level?

Argentina's Laguna del Carbón, a salt lake in Patagonia, sits about 20 m lower than Badwater Basin in Death Valley, which is the lowest point of North America alone.

Which Caucasus peak counts as Europe's highest, above Mont Blanc, when the continental boundary follows that range's watershed?

Mount Elbrus owes the title to a convention: move the line north to the Kuma–Manych Depression, as many Russian maps once did, and the whole Caucasus becomes Asian, leaving Mont Blanc on top.

What is the Ice Age land bridge, up to 1,000 km wide, that let people walk from Siberia into Alaska called?

Beringia carried a founding population of at most a few thousand people from eastern Siberia during the Last Glacial Maximum, before they spread into the Americas.

Which shallow seabed platform joins Sumatra, Java and Borneo to mainland Asia and turns to marshy plain when seas fall?

The Sunda Shelf was dry land in the ice ages, when the sea stood 30 to 40 m or more lower, which is how elephants, tigers and rhinos reached islands now ringed by open water.

Which cool limb of the North Atlantic Gyre chills the shores of Morocco and Western Sahara for most of the year?

The Canary Current does more than cool the coast: air chilled above its water rarely rises to make rain, which helps keep that shoreline a desert, and the Phoenicians were already fishing it.

Where is Earth's crust at its thinnest, typically only 5 to 10 km from top to bottom?

Beneath deep ocean basins the crust is only 5 to 10 km thick, against about 30 km under the continents, which is why the 1960s attempt to drill through to the mantle was made from a ship.

Which sea between Cape Horn and Antarctica, bounded west by the Drake Passage, is named after a 1902 expedition ship?

The Scotia Sea is named for the ship of the Scottish National Antarctic Expedition; its most famous crossing came in 1916, when Shackleton and five men sailed a lifeboat across it to fetch rescue.

Which ocean is so vast that its area is larger than all of Earth's land combined?

The Pacific covers about 165 million square kilometres, roughly a third of the planet's surface. At its widest it stretches almost halfway around the world.

Which continent is classed as a desert bigger than the Sahara because it receives so little rain or snow?

Antarctica is on average the coldest, driest and windiest of the continents. Its coast gets a little over 200 mm of precipitation a year, and the interior far less.

Which sea is the only one with no land boundary, defined entirely by the ocean currents circling it?

The Sargasso Sea is named for Sargassum, the free-floating brown seaweed that mats its surface. Eels from both sides of the ocean swim there to spawn.

Which river sends more water to the ocean than the next seven largest independent rivers combined?

The Amazon accounts for about 20% of all the river water flowing into the world's oceans. On average it discharges well over 200,000 cubic metres every second.

Which continent includes the Caribbean islands and the seven countries between Mexico and Colombia?

North America runs south as far as Panama, so Guatemala, Costa Rica and their neighbours all belong to it. Greenland is counted as part of it too.

Which Italian navigator's first name did a German mapmaker Latinise in 1507 to label a newly charted continent?

Amerigo Vespucci had described the lands as a 'New World'. By 1513 the mapmaker, Martin Waldseemüller, had second thoughts and relabelled them 'Terra Incognita', but the name America survived.

Which Hawaiian volcano is often called the world's tallest mountain when measured from its base on the ocean floor?

Mauna Kea rises 4,207 m above sea level, only about 38 m more than neighbouring Mauna Loa. Measured from its underwater base, though, it stands taller than Everest is high.

Which crescent-shaped chasm, about 2,550 km long, holds the deepest known point in any ocean, nearly 11 km down?

The Mariana Trench is so deep that its lowest point lies more than 2 km farther from sea level than the summit of Mount Everest. It is named after the nearby Mariana Islands.

Which country has most of its land on one continent but about 80% of its people on another?

Russia's smaller western part holds Moscow, St Petersburg and nearly 110 million people. Siberia covers most of the national territory, almost 9% of Earth's land surface.

Which continent shares its name with a Phoenician princess of Greek myth, carried off by Zeus in the form of a bull?

Europe may take its name from Europa herself, though scholars still dispute where the word came from. In the myth, Zeus later set the bull among the stars as the constellation Taurus.

Which continent has the most countries, with 54 fully recognised sovereign states?

Africa also has the youngest population of any continent. In 2012 the median age there was 19.7, against 30.4 for the world as a whole.

Which continent holds both the highest mountain summit on Earth and the lowest dry land, on the Dead Sea shore?

Asia's two extremes sit more than 9 km apart in height: Everest's summit and a shoreline more than 430 m below sea level. That shore drops by more than a metre a year as the lake recedes.

Which continent has both the world's tallest uninterrupted waterfall and its driest non-polar desert?

South America's Angel Falls drops 979 m in Venezuela, while some weather stations in Chile's Atacama Desert have never recorded any rain at all.

Which ocean, filling a long S-shaped basin, is on average the saltiest of the major oceans?

The Atlantic is named after Atlas, the Titan of Greek myth who held up the heavens. Its surface salinity ranges from about 33 to 37 parts per thousand.

Which Portuguese navigator gave the 'South Sea' its modern name after a stormy passage through a strait in 1520?

Ferdinand Magellan chose the name because the waters beyond the strait seemed so peaceful. For two centuries afterwards the ocean was often called the Sea of Magellan in his honour.

Which mountain range runs 2,500 km south from the Kara Sea along the conventional line between two continents?

The Urals are among the world's oldest surviving mountain ranges. Rich ore finds in the 17th century later made them their country's largest mineral base.

Which sea-level canal, opened in 1869, needs no locks to carry ships between the Mediterranean and the Red Sea?

Suez needs no locks because the land is flat and the sea levels at its two ends barely differ. An earlier plan had been dropped in the mistaken belief that one sea stood 8.5 m higher than the other.

Which strait, about 14 km wide at its narrowest, links the Mediterranean Sea to the open ocean?

Gibraltar is all that keeps the Mediterranean full: were the strait closed, most of the sea's water would evaporate within about a thousand years. Its flanking mountains were the ancient Pillars of Hercules.

Which dormant volcano, the highest peak on its continent, is the tallest free-standing mountain in the world?

Kilimanjaro is built from three volcanic cones, and only Kibo, the tallest, could erupt again. Its ice cap lost more than 80% of its extent during the 20th century.

Which country covers roughly half of its continent and borders every other country there except Chile and Ecuador?

Brazil is the world's fifth-largest country by area. It takes up 47.7% of its continent, including much of the interior and a long stretch of the eastern coast.

Which country reaches onto a second continent through the Sinai Peninsula, which Israel occupied from 1967 until 1982?

Egypt's Sinai is the only part of the country that lies outside its home continent. Israel withdrew under the peace treaty the two neighbours had signed in 1979.

Which zone around the largest ocean's rim has about 90% of the world's earthquakes and most of its volcanoes?

The Ring of Fire is not a single structure. It is a chain of plate boundaries about 40,000 km long, where one tectonic plate dives beneath another.

Which warm, swift ocean current passes through the Straits of Florida and runs up the east coast of the United States?

The Gulf Stream was strong enough in 1513 to push Juan Ponce de León's ships backwards despite a good wind. Spanish fleets soon learned to ride it home from the Caribbean.

Which river, the longest on its continent, flows north through the Nubian Desert to a delta on the Mediterranean?

The Nile carries much less water than other great rivers such as the Congo, despite its length. Its two main branches, the White Nile and the Blue Nile, meet at Khartoum.

Which mountain range, the longest on any continent, runs through seven countries along a western coast?

The Andes form a continuous wall of highland averaging about 4,000 m in height. They pass through Venezuela, Colombia, Ecuador, Peru, Bolivia, Chile and Argentina.

Which island nation south-west of India is the world's lowest-lying country, averaging about 1.5 m above sea level?

The Maldives' highest natural point stands only 2.4 m above the sea. Its 1,192 coral islands are grouped in a double chain of 26 atolls.

Which warming of the tropical ocean off Peru did fishermen name for its habit of arriving around Christmas?

El Niño means 'the boy' in Spanish: the original phrase, El Niño de Navidad, referred to the newborn Christ. The cooling phase of the same cycle is called La Niña.

What term describes a narrow strip of land, like Panama or Kra, that joins two larger landmasses across water?

Isthmus comes from the ancient Greek word for 'neck'. Its sea counterpart is a strait, a narrow stretch of water linking two larger ones.

What name is given to the shallow, submerged edge of a continent that ends where the seabed starts to plunge?

The continental shelf usually ends at a remarkably uniform depth of roughly 140 m. That is probably a relic of the ice ages, when sea level was lower than it is today.

Which South African headland is the continent's true southern tip and the official dividing point between two oceans?

Cape Agulhas means 'Cape of Needles' in Portuguese. By one account navigators around 1500 found their compass needles pointing to true north there; another credits its jagged rocks and reefs.

Which peak, one of the Seven Summits, is the highest mountain in the Americas at almost 7,000 m?

Aconcagua can be climbed by its normal route without ropes or specialised equipment. That is why it is often described as the highest non-technical mountain in the world.

Which strait between the Malay Peninsula and Sumatra is the main shipping channel linking two oceans?

Malacca narrows to just 2.8 km at the Phillip Channel near Singapore, which makes it one of the world's most congested shipping choke points.

Which Royal Navy ship's 1872–1876 voyage laid the foundations of oceanography and found about 4,700 new marine species?

HMS Challenger carried 181 miles of Italian hemp rope for measuring the depth of the sea. It travelled mostly under sail, saving its steam engine for jobs such as dragging the dredge.

Which supercontinent, which began to fragment about 180 million years ago, is named after a region of India?

Gondwana comes from the Sanskrit for 'forest of the Gonds'. Its last pieces parted between about 66 and 23 million years ago, when a southern land bridge broke up.

Which country became the largest on its continent in 2011, when Sudan split in two?

Algeria is also the tenth-largest country in the world. The Sahara dominates most of it, so most Algerians live in the fertile, mountainous north.

Which island, the world's second largest, was joined to a neighbouring continent until seas rose after the last ice age?

New Guinea is home to almost a thousand tribal groups and nearly as many languages. That makes it the most linguistically diverse area in the world.

Which island, the fourth largest in the world, split from the Indian subcontinent about 90 million years ago?

Madagascar has been isolated for so long that over 90% of its wildlife is found nowhere else. It had already broken away from the mainland about 180 million years ago.

What did sailors name the windless ocean belt near the equator where the two sets of trade winds meet?

Doldrums is the sailors' name for the Intertropical Convergence Zone. From space it shows up as a band of clouds encircling the Earth.

Which roadless gap in the Pan-American Highway lies on the narrow land bridge that joins two continents?

Darién swallows the road at Yaviza in Panama. It resumes roughly 106 km away at Turbo in Colombia, beyond jungle and a marshland at least 80 km wide.

Which deep-diving craft carried Jacques Piccard and Don Walsh to the deepest point of the ocean floor in January 1960?

Trieste floated on tanks of gasoline, which is lighter than water and hardly compresses under pressure. To sink, it carried iron shot as ballast.

What name is given to the oceanic pole of inaccessibility, the spot in the sea that lies farthest from any land?

Point Nemo's exact coordinates remain unknown, because coastlines have not been surveyed precisely enough. Its waters are relatively lifeless, far from the nutrients that wash off the land.

Which superocean surrounded the supercontinent Pangaea and covered almost 70% of Earth's surface 250 million years ago?

Panthalassa combines the ancient Greek words for 'all' and 'sea'. Its original floor has now completely disappeared, swallowed along the margins of the continents around it.

Which peak, about 1,200 km from the South Pole, is the highest on its continent and was first climbed in 1966?

Mount Vinson is named after Carl Vinson, a congressman from Georgia who championed funding for polar research. An American team led by Nicholas Clinch made the first ascent.

Which lake, the largest of hundreds hidden beneath a polar ice sheet, lies under about 4,000 m of ice?

Vostok has probably been sealed off for about 15 million years. Scientists compare it to the ice-covered oceans thought to exist on Saturn's moon Enceladus.

Which zone of the ocean is the deepest, found almost entirely in trenches more than 6 km below the surface?

Hadal refers to Hades, the ancient Greek god of the underworld. The zone covers less than 0.25% of the world's seafloor.

Which American cartographer's 1950s maps of the ocean floor revealed a rift valley that supported continental drift?

Marie Tharp spotted the valley in sounding data, but her colleague Bruce Heezen was unconvinced at first. Accepting it would have meant backing a theory that was then controversial.

Which British captain led the first recorded crossing of the Antarctic Circle in 1773, hunting a fabled southern land?

James Cook made the crossing on 17 January 1773, during his second voyage. He had been sent to settle whether a supposed continent called Terra Australis really existed.

Which funnel-shaped bay on Canada's east coast has the highest tidal range in the world, reaching about 16 m?

The Bay of Fundy moves about 100 billion tonnes of water in and out on each tide. That is more than the combined flow of all the world's rivers over the same period.

Which river, the longest on its continent, never reaches an ocean because it drains into a landlocked sea?

The Volga rises in the Valdai Hills north-west of Moscow, less than 230 m above sea level. It ends in the Caspian Sea at 28 m below it.

Which coral system, over 2,300 km long, is the biggest single structure made by living organisms?

The Great Barrier Reef is made up of over 2,900 individual reefs and 900 islands. It is large enough to be seen from outer space.