10 Interesting Facts About Amazon Forest The Amazon is the world’s largest tropical rainforest, spanning over 5.5 million square kilometers. The Amazon River, running through the forest, is around 6,840km long, considered the second longest river globally. The canopy allows only 1% of sunlight to reach the forest floor, where rain takes 10 minutes to reach the soil. Indigenous tribes inhabit the forest, some without contact with the outside world. It includes over 40,000 plant species, 3,000 fish species, 1,300 bird species, and 430 mammal species Deadly creatures such as electric eels, piranhas, and jaguars and Poisonous dart frogs are found in the Amazon. The Amazon houses approximately 2.5 million different insects. According to recent data, about 17% of the Amazon Rainforest has already been lost. The rainforest's destruction contributes significantly to global carbon emissions. The rainforest's vegetation plays a crucial role in regulating the global climate.