Islands of the World — Where Geography Creates Paradise, Mystery, and Wonder
There is something uniquely compelling about an island. Surrounded by water
on all sides, separated from the mainland by distance and ocean,
islands of the world have always captured the human
imagination — as places of mystery, paradise, isolation, and extraordinary
natural beauty. But islands are far more than romantic geography. They are
among the most scientifically significant environments on Earth, hotspots of
evolution and biodiversity that have contributed more to our understanding
of the natural world than almost any other type of landscape. There are
approximately 900,000 islands on Earth — ranging from
the vast continental island of Greenland at 2.1 million km²
to tiny coral atolls barely a metre above sea level that are at imminent
risk from rising seas.
Islands are formed by an equally diverse range of geological processes —
volcanic activity builds oceanic islands from the seafloor
up, tectonic activity uplifts continental fragments,
coral reef growth creates atolls, and
sea level change isolates landmasses from former continental
connections. On DharaVerse, we explore the full spectrum
of island geography — from the formation and classification of islands
to their extraordinary biodiversity, cultural diversity, and the urgent
challenges they face from climate change and sea level rise.
This is island geography told in full.
Islands of the World — Key Statistics
-
~900,000 — Estimated total number of islands on Earth
-
2.1 million km² — Size of Greenland,
the world's largest island (excluding Australia, which is classified
as a continent)
-
17,508 — Number of islands in Indonesia
— the world's largest archipelago nation
-
0.44 km² — Area of Vatican City,
the world's smallest island nation (technically peninsula-based,
but smallest sovereign state)
-
600 million+ — Number of people who live on islands
worldwide
-
Madagascar — Home to 90% of wildlife
species found nowhere else on Earth — the world's greatest
island biodiversity hotspot
Major Islands of the World — From Arctic Giants to Tropical Wonders
-
Greenland — The Arctic Giant:
The world's largest island at 2.1 million km²,
Greenland is an autonomous territory of Denmark
located in the North Atlantic and Arctic Oceans. Approximately
79% of Greenland's surface is covered by the Greenland
Ice Sheet — the second largest ice body on Earth after
the Antarctic Ice Sheet. If all of Greenland's ice melted, global
sea levels would rise by approximately 7 metres.
Despite being the world's largest island, Greenland has a population
of only about 56,000 people, making it the most
sparsely populated territory on Earth.
-
New Guinea — The Island of Extremes:
The world's second largest island at 785,753 km²,
New Guinea is divided between Indonesia (the western
half, called Papua) and the independent nation of Papua New Guinea
(the eastern half). New Guinea has the third largest
tropical rainforest in the world and is home to
extraordinary biodiversity including the spectacular
birds-of-paradise. It also has extraordinary
cultural diversity — Papua New Guinea alone has over
800 languages, the greatest linguistic diversity
of any nation on Earth.
-
Borneo — Heart of Southeast Asian Biodiversity:
The world's third largest island at 743,330 km²,
Borneo is divided among three countries —
Malaysia, Indonesia, and the tiny sovereign nation of Brunei.
Borneo's ancient rainforests, which have existed
for approximately 140 million years, are among
the most biodiverse on Earth — home to orangutans,
pygmy elephants, clouded leopards, and the
Rafflesia arnoldii — the world's largest flower.
-
Madagascar — The World's Greatest Biodiversity Island:
Separated from mainland Africa approximately
88 million years ago,
Madagascar has evolved in such extraordinary
isolation that approximately 90% of its wildlife is
found nowhere else on Earth. This includes all
107 species of lemurs, hundreds of endemic
reptile, amphibian, and plant species, and extraordinary
endemic birds. Madagascar is the world's fourth largest island
at 587,041 km² and is considered one of the
world's most important biodiversity hotspots — and one of the
most threatened, with over 90% of its original forest
cover lost.
-
Sumatra — Indonesia's Wild Heart:
At 473,481 km², Sumatra is
the world's sixth largest island and one of the last places on
Earth where tigers, rhinoceros, orangutans, and elephants
share the same forest. It is home to the world's largest flower
(Rafflesia arnoldii) and the world's tallest flower
(Amorphophallus titanum). Sumatra sits along the
Sunda megathrust — one of the world's most
seismically active fault zones, which generated the devastating
2004 Indian Ocean tsunami.
-
Japan — The Archipelago Nation:
Consisting of 6,852 islands,
Japan is one of the world's great archipelago
nations. Its four main islands — Honshu, Hokkaido,
Kyushu, and Shikoku — contain the vast majority of
its population and civilization. Japan sits at the convergence
of four tectonic plates, making it one of the world's most
seismically active nations — experiencing approximately
1,500 earthquakes per year. Japan's volcanic
island geography has produced a culture deeply shaped by its
physical environment — from its reverence for
Mount Fuji to its world-class expertise in
earthquake engineering and disaster preparedness.
-
The Galápagos Islands — Darwin's Laboratory:
Located approximately 900 kilometres off the
coast of Ecuador in the Pacific Ocean, the
Galápagos Islands are arguably the most
scientifically important islands in the world. It was here that
Charles Darwin observed the variation in
finch species and giant tortoises that would inspire his
theory of natural selection — the foundation
of modern biology. The islands are a UNESCO World Heritage Site
and home to extraordinary endemic wildlife including
marine iguanas, giant tortoises, blue-footed boobies,
and the Galápagos penguin — the only penguin
species found north of the equator.
Island Ecosystems, Biodiversity, and Culture
Islands are the laboratories of evolution. Isolated from
mainland populations for millions of years, island species evolve
independently, filling ecological niches in unique ways and producing
extraordinary endemic biodiversity found nowhere else on Earth.
This process of adaptive radiation — where a single
ancestor species diversifies into many species adapted to different
ecological roles — has produced some of the most remarkable examples
of evolution on the planet. The Hawaiian honeycreepers —
over 50 species of birds descended from a single finch ancestor —
and Darwin's Galápagos finches are classic examples.
However, this same isolation that makes island biodiversity so unique
also makes it extraordinarily vulnerable. Island species
that evolved without mainland predators have no natural defences against
invasive animals like rats, cats, and mongoose introduced by human activity.
Consequently, islands account for approximately
80% of all recorded animal extinctions in modern times.
Furthermore, with sea levels rising due to climate change,
low-lying island nations like the Maldives, Tuvalu, Kiribati,
and the Marshall Islands face the existential threat of
being submerged entirely within this century.
Explore the World's Islands on DharaVerse
Islands are where geography becomes poetry — where isolation creates
uniqueness, where the ocean meets the land in a thousand different ways,
and where the story of life on Earth is written in its most concentrated
and extraordinary form. On DharaVerse, explore detailed
profiles of every major island and archipelago on Earth, interactive island
maps, biodiversity data, and the compelling human stories of island
civilizations across the globe. Connect islands to the
oceans that surround
them, the volcanoes
that built them, and the
coral reefs
that frame them.
Every island is a world unto itself. Begin your exploration today.