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The Amazon rainforest is something we all recognize. Chances are, many of us have studied it for a school project at some point (or perhaps you're working on one right now). It's not just one of the most unique locations on Earth, but also one of the most stunning. While we all have a general understanding of the Amazon, its vast ecosystem harbors some truly remarkable secrets. From breathtaking wonders to life-changing discoveries, here are 10 reasons why the Amazon is so extraordinary.
10. A Delicate Ecosystem
Ecosystems are often very delicate, where even the smallest disruption can have a cascading effect, significantly altering the environment. A well-known example of this is the havoc caused by introducing the cane toad to Australia. More recently, the reintroduction of grey wolves to Yellowstone National Park has had such a profound impact that it has physically altered the rivers there. While all ecosystems have a level of fragility, the Amazon’s incredible biodiversity makes it even more vulnerable to imbalance. A great example of this is seen in the case of the Brazil nut.
The Brazil nut can only be pollinated by a single species of bee, the Euglossine. These bees are uniquely strong enough to open the flower lids. Like most bee species, it's primarily the females that perform this pollination, using the tree as a food source while they carry out this task. However, the relationship is even more intricate: Male bees rely on the scent from the tree's orchids to attract females for mating. If the females don't pollinate the tree, the males won't have access to the scent, leading to the extinction of both the bees and the tree.
To make things even more specific, the tough shell of the Brazil nut can only be cracked by a few animals, including the agouti, a rodent that breaks open the shell and buries the seeds throughout the forest. Efforts to cultivate these trees in orchards have been unsuccessful every time. With the rainforest facing such damage, this is just one example of how easily this ecosystem can unravel, like a chain reaction.
9. The Bodele Depression
After thousands of years of evolution in such a diverse biome, the Amazon rainforest has developed an ecosystem that requires perfect synchronization, as seen with the Brazil nut’s complex relationship with pollinators. Additionally, it has a high demand for nutrients. Despite the rainforest's abundance of life, it meets this demand from an unexpected source.
The Bodele Depression is found in Chad, within the southern portion of the Sahara Desert. Although it’s relatively small—making up less than 0.5 percent of either the Amazon or the Sahara—it plays an enormous role. Every year, it sends 3.6 million metric tons (40 million tons) of mineral-rich sand over the Atlantic, fertilizing the Amazon basin. It's estimated that more than half of the dust in the Amazon originates from this small area in the Sahara, 5,000 kilometers (3,100 mi) away. Without this contribution, the rainforest as we know it would not be able to thrive.
8. Extinctions
The Amazon rainforest holds one of the highest levels of biodiversity found anywhere on Earth—possibly the highest. It's estimated that one in ten animal species globally resides in the Amazon. Additionally, a single hectare (2.5 acres) of this rainforest can be home to up to 750 species of trees and 1,500 species of higher plants.
Experts warn that every year, 120,000 square kilometers (46,300 square miles) of rainforest are lost, much of which occurs within the Amazon. This deforestation is responsible for the daily extinction of 135 plant and animal species, amounting to an alarming 50,000 extinctions annually. As this list unfolds, you’ll understand why this statistic is even more dire than it first appears.
When people imagine rainforests being destroyed, they typically picture large corporations arriving with heavy machinery to cut down as many trees as possible, converting them into paper, furniture, and other products. However, in reality, commercial logging, both legal and illegal, only accounts for less than 3 percent of deforestation in the Amazon. The true cause of deforestation is cattle ranching, which is responsible for between 60–80 percent of the destruction occurring in the region.
7. Mysterious Rings
As deforestation continues, unexpected discoveries have surfaced. Increasingly, mysterious ditches are being uncovered across Brazil and Bolivia. These square, circular, and linear ditches, some reaching depths of up to 5 meters (16 ft), have left archaeologists perplexed regarding who constructed them, how they did it, and for what purpose. One theory suggests the ditches had religious significance, which is certainly plausible. Another theory posits that they were used for drainage. A third theory is that they served a defensive purpose. While a ditch might not seem like an impressive defense, nearly identical formations have been found in Ireland (pictured above), where ditches were dug and the excess earth piled to create mounds beside the ditch, making it extremely difficult for invaders to break through.
Some of the ditches extended over 1 kilometer (0.6 mi) in length. Scientists from the University of Reading sought to determine how many people would have been needed to construct such structures and how they could have achieved this feat, as there was no evidence suggesting that people living in the area more than 2,000 years ago had the necessary tools. The mystery was unraveled when the team analyzed pollen sediments, discovering grass pollen and traces of maize, indicating that the area had previously been a savannah with farming activity. However, the exact purpose of the ditches remains unclear.
6. Economics
It’s clear that no one with a conscience would willingly support the destruction of the rainforest, but when it comes down to it, some people are willing to sacrifice the environment for a quick profit, regardless of the devastation they cause. The Amazon is undeniably a natural treasure, so to clear it for cattle ranching would be like discovering El Dorado and deciding to raze it to make room for livestock.
We already know that there are far more hectares used for pasture than cattle could ever fully utilize, and although logging contributes to deforestation, it’s a much smaller factor than many believe. In fact, leaving the rainforest untouched is far more beneficial—not just environmentally, but also economically. Research found that one hectare in the Amazon is worth $148 when used for cattle grazing, $1,000 when used for timber, and $6,330 when used for sustainable practices such as harvesting fruit or latex.
5. The River
The Amazon River is undoubtedly one of the most iconic rivers on Earth, and for many reasons. Depending on the method of measurement, the Amazon could very well be considered the largest river in the world. It begins in the Andes, only 192 kilometers (119 mi) away from the Pacific Ocean, which it once emptied into. However, as the mountains rose, the river’s path shifted, and today, it stretches 6,437 kilometers (4,000 mi) across South America before flowing into the Atlantic Ocean.
Although the Nile River is technically 400 kilometers (250 mi) longer, the Amazon releases far more water. The Nile discharges about 80 billion gallons of water each day. While that is an astonishing quantity, it is still a mere fraction of the Amazon’s daily output, which averages 776 billion gallons. During the wet season, the river’s discharge reaches an almost incomprehensible 2.7 trillion gallons per day.
Due to the massive volume of water flowing from the river into the ocean, the water extends up to 100 kilometers (60 mi) into the Atlantic, turning it brown. This phenomenon once assisted ships in navigating the vast ocean before they sighted land. To put this in perspective, that’s 400 times the length of Central Park or 15 times the length of Manhattan.
4. Medical Potential
The Amazon rain forest, with its astonishing biodiversity and its truly unique life forms, is believed to be an untapped reservoir of potential cures and treatments for a wide variety of health issues. According to the US National Cancer Institute, there are 3,000 plants with anti-cancer properties, and more than two-thirds of these can be found in rain forests. What's more, it's estimated that rain forest plants are responsible for a quarter of all Western pharmaceuticals and a quarter of anti-cancer medications.
These statistics are already impressive, but they become even more mind-blowing when you consider that less than 1 percent of rain forest plants have been properly studied. The Amazon, with more rain forest than the entire rest of the world combined, holds unmatched medical potential. Yet, as it continues to shrink, we have already lost cures for countless diseases—and this loss continues every day.
3. The Amazon’s Secret River
While the Amazon River is a household name and its massive size is well-known, few are aware that another major river was discovered in the Amazon as recently as 2011. You might assume that, given how expansive the Amazon is and how thick its canopy can be, a smaller river would have remained hidden all this time. However, the Hamza River, as it is now called, is nearly as long as the Amazon itself, stretching 6,000 kilometers (3,728 mi). It is also remarkably wide, ranging from 200–400 kilometers (124–248 mi), which surpasses the width of the Amazon's mouth.
As you might have guessed, the Rio Hamza is an underground river. Its existence was uncovered using data from old oil wells and computer simulations, which helped reveal its presence deep beneath the Earth, 4 kilometers (2.5 mi) below the surface. Despite its massive width, the Hamza River doesn't behave like a traditional river. Instead of rushing, it flows like a sluggish stream, a trickle of water. Even though its flow is only 3 percent that of the Amazon, it still discharges an impressive 46 times the amount of water as the River Thames.
2. Global Regulator
The immense size of the Amazon River has already been established, but its global significance is even more remarkable. The Amazon River contains around 20 percent of the world’s fresh water, highlighting its crucial role in sustaining life. Additionally, while we’ve mentioned that the Amazon makes up more than half of all rain forests, that alone doesn’t fully convey its importance. Rain forests currently cover about 6 percent of the Earth’s surface, a significant drop from the 14 percent they once covered. The Amazon spans 6.7 million square kilometers (2.6 million sq mi) across nine countries and is home to nearly 400 billion trees, which contribute approximately 20 percent of the planet’s oxygen.
While the immediate loss of the Amazon wouldn’t lead to suffocation, its destruction would have catastrophic consequences globally. The Amazon contains approximately 90–140 billion metric tons of carbon, which is three to four times the amount released into the atmosphere each year. Deforestation alone is responsible for about 15 percent of global emissions, a figure higher than the entire global transport sector. If the Amazon were to be destroyed in the next 40 years, far fewer trees would be left to absorb the rising levels of carbon in the atmosphere. The absence of these trees would mean it could take centuries for new ones to grow, if that’s even possible. In other words, we’re worsening the situation while simultaneously eroding our ability to fix it.
1. Pestalotiopsis Microspora
We’ve already seen the Amazon’s biodiversity offer immense medical and economic benefits without harm to wildlife. However, the Amazon also presents practical solutions for some of life’s most pressing challenges.
Pestalotiopsis microspora is among a group of fungi that consume plastic discovered by Pria Anand, a Yale University student. She analyzed 59 samples in total, and while many displayed the ability to break down plastic, Pestalotiopsis microspora stands out for its unique ability to degrade plastic even when grown without oxygen, a process known as anaerobic growth. This is particularly important because environments like landfills or oceans, where plastic is abundant, lack the oxygen required for most fungi to thrive. While research is still in the early phases, this fungus could potentially offer a solution to one of the most pressing environmental challenges we face today.
