By Ojukwu Chukwu
A groundbreaking archaeological discovery in Côte d’Ivoire has overturned a long-held belief that early humans avoided dense tropical rainforests.
Scientists have now found evidence that humans were living in West African rainforests about 150,000 years ago, nearly doubling previous estimates and forcing researchers to rethink the story of human evolution.
For decades, scientists assumed that ancient humans preferred open environments such as savannas, grasslands, and coastal regions.
Rainforests were considered too difficult to survive in because of their dense vegetation, toxic plant species, limited visibility, and scarce food resources.
However, a new study published in the journal Nature has revealed that early Homo sapiens were far more adaptable than previously believed.
The discovery was made at the Bété I archaeological site, located about 20 kilometers north of Abidjan in Côte d’Ivoire. The site was first excavated in the 1980s by Ivorian archaeologist Yodé Guédé, but scientists at the time lacked the technology needed to determine the true age of the findings.
Four decades later, researchers returned to the site armed with modern dating techniques. Using Optically Stimulated Luminescence (OSL) and Electron Spin Resonance (ESR) methods, they analyzed quartz grains found within surrounding sediments.
The results showed that humans occupied the rainforest environment approximately 150,000 years ago.
Because no human bones were recovered, researchers relied on these advanced dating technologies to establish the age of the occupation.
To confirm that the area was indeed a rainforest during that period, scientists examined fossil pollen, phytoliths (microscopic silica remains from plants), and chemical traces preserved in the soil.
Their analysis confirmed that the region was heavily forested when ancient humans lived there.
The findings challenge the traditional narrative that humanity’s early development occurred mainly in open African landscapes. Instead, they suggest that different human populations adapted to a wide range of environments much earlier than previously thought.
The study also raises a fascinating question: if humans have occupied rainforests for more than 150,000 years, how much influence did they have on shaping these ecosystems long before recorded history?
Researchers now believe that ecological diversity played a crucial role in human evolution, with separate populations developing and surviving in vastly different habitats across Africa.
The discovery significantly expands our understanding of early human adaptability and suggests that rainforests were not merely obstacles to human expansion but were also among the environments that helped shape the development of our species.
In essence, the rainforest is no longer viewed as a late chapter in the human story. Evidence from Côte d’Ivoire indicates it has been part of that story for at least 150,000 years.
Tags: #Archaeology #HumanEvolution #AncientHumans #HomoSapiens #Rainforest #Africa #CotedIvoire
