South America's Greatest River
Where the Earth Breathes
Stretching over 6,400 kilometres across the continent, the Amazon River is the world's largest river by discharge volume — a colossal artery of life carrying one-fifth of all fresh water that flows into the world's oceans.
ExploreThe Amazon originates high in the Andes Mountains of Peru, near the snow-capped peak of Nevado Mismi at an elevation of roughly 5,170 metres. From this icy source, a trickle of meltwater descends eastward, gathering tributaries as it traverses the vast lowland basin.
Flowing through Peru, Colombia, and Brazil, the river grows to extraordinary proportions. At its widest point during flood season, the Amazon can stretch over 50 kilometres across — so wide that the opposite bank is invisible from shore. It discharges an average of 209,000 cubic metres of water per second into the Atlantic Ocean.
The Amazon basin encompasses nine countries and spans an area roughly the size of the continental United States. The floodplain, called the várzea, is seasonally inundated, creating an ever-changing mosaic of land and water.
Simplified schematic of the Amazon River system
The Amazon rainforest that surrounds the river is the largest tropical forest on Earth, covering over 5.5 million square kilometres. It is sometimes called the "lungs of the planet" because its trees absorb vast quantities of carbon dioxide and produce approximately 20% of the world's oxygen.
The canopy rises 30–40 metres, with emergent trees reaching 60 metres. Multiple layers — emergent, canopy, understory, and forest floor — each host unique communities of life adapted to specific light and humidity conditions.
Seasonally flooded várzea forests are inundated for months each year. Fish swim among the treetops, dispersing seeds across the floodplain. These dynamic environments are among the most productive ecosystems on Earth.
The forest generates its own rainfall through transpiration. Trees release enormous quantities of water vapour that form "flying rivers" — aerial currents of moisture that carry precipitation deep into the South American continent.
Amazon forests store an estimated 150–200 billion tonnes of carbon in their biomass and soils — the equivalent of roughly 15–20 years of current global carbon emissions. Their protection is critical for climate stability.
African dust carried by trade winds fertilises the Amazon each year — an intercontinental partnership. The Sahara Desert sends millions of tonnes of mineral-rich sediment across the Atlantic to replenish the nutrient-poor tropical soils.
A single hectare of Amazon rainforest may contain more tree species than are native to all of Europe. The river basin is home to roughly 10% of all species known to science, with thousands more yet undescribed.
No ecosystem on Earth rivals the Amazon for sheer biological diversity. Scientists estimate that the basin harbours one in ten of all species on the planet — many still unknown to science.
The Amazon holds more freshwater fish species than any other river system — more than the entire Atlantic Ocean.
Macaws, toucans, harpy eagles, and thousands of other birds fill the forest canopy with colour and song.
Including jaguars, tapirs, giant anteaters, river dolphins, and the world's largest rodent, the capybara.
From the Victoria amazonica water lily to towering Brazil nut trees that can live for 500 years.
Notable inhabitants include the anaconda — the world's heaviest snake — the pink river dolphin (boto), black caimans that can exceed 5 metres, electric eels capable of generating 600-volt discharges, and the fearsome piranha, whose reputation far exceeds its actual danger to humans.
The Amazon is not just a river — it is a living world, a civilisation of nature, the greatest expression of biological abundance our planet has ever produced.
The Amazon faces unprecedented threats from deforestation, climate change, illegal mining, and agricultural expansion. Scientists warn that continued destruction risks triggering a "dieback" tipping point beyond which the forest cannot regenerate.
Since 1970, over 700,000 km² of Amazon forest has been cleared — an area larger than France. Though deforestation rates have slowed from peak levels, clearing continues at thousands of square kilometres per year.
Research suggests that if 20–25% of the Amazon is deforested, the forest may begin an irreversible transition to savanna — a process called "savanisation" that would release enormous stores of carbon and collapse biodiversity.
Studies show that indigenous territories — where communities hold legal land rights — have significantly lower deforestation rates. Protecting indigenous rights is one of the most effective conservation strategies available.
Human beings have lived along the Amazon for at least 11,000 years. At the time of European contact in the 16th century, the river basin is believed to have supported a population of millions, with sophisticated civilisations that built extensive earthworks, managed the forest, and traded across vast distances.
Today, over 400 distinct indigenous groups call the Amazon home, speaking more than 300 languages. Many communities maintain deep traditional knowledge of the forest's plants and animals — a living library of ecological wisdom accumulated over thousands of years. Urban centres like Manaus, Belém, and Iquitos house tens of millions more, blending Amazonian and global cultures.
The river remains a highway of commerce and daily life. Riverboats are the buses of the Amazon, connecting remote communities that have no road access. Fish from the river feeds millions. The forest provides medicine, building materials, and spiritual meaning.
The mouth of the Amazon was home to the Marajó civilisation, which created sophisticated ceramics and managed the landscape through elaborate earthwork platforms for agriculture and habitation.
Pre-Columbian Amazonians created "dark earth" — anthropogenic soil of extraordinary fertility still found today. This engineered soil sequesters carbon and remains more productive than surrounding soils centuries later.
Built during the rubber boom of the late 19th century, the Teatro Amazonas in Manaus stands as a testament to the extraordinary wealth — and exploitation — that the Amazon's resources have generated.