Recent dredging off the coast of Java has revealed fossil evidence that changes our understanding of how ancient human ancestors traveled. Among the sediment pulled from the seabed, two skull fragments from Homo erectus were discovered. This marks the first time remains of this species have been found underwater between Southeast Asian islands.
Fossils Point to Connected Landmasses
The dredging was part of a marine construction project, but it unexpectedly unearthed key fossils, including those of Homo erectus. Researchers suggest that this part of the sea was once a connected landmass called Sundaland. About 140,000 years ago, during the last glacial period, lower sea levels linked what we now know as Java, Sumatra, Borneo, and Bali into one land with mountains and vast savannahs.
This environment, filled with rivers and grasses, likely supported early humans and animals as they moved across Southeast Asia. Archaeologist Harold Berghuis from Leiden University, who led the study, noted that Homo erectus lived near large rivers, which provided both drinking water and food.
Advanced Hunting Techniques
The area’s diversity provided Homo erectus with a wide range of food options. Researchers found bones of river turtles and early bovines with cut marks, indicating they were hunted and processed for meat and bone. This suggests that Homo erectus had hunting skills similar to those later seen in Denisovans and Neanderthals.
Additionally, they uncovered mussel shells that show signs of use as tools. Engraved shells from the same region hint at an artistic side to their lives, possibly among the oldest examples of hominin engravings.
Physical Traits That Made a Difference
The skulls also highlight significant physical traits of Homo erectus. They had larger bodies, longer legs, and shorter arms, which made them better walkers and hunters. Their brain size was over 50% larger than that of Australopithecus, suggesting greater cognitive abilities.
Berghuis points out that the Middle Pleistocene era, when these fossils were found, was a time of remarkable diversity and mobility among early human groups. The discovery of Homo erectus in these ocean depths illustrates the species’ adaptability. However, rising sea levels later submerged the ancient land bridge, isolating these groups.
In a time when our comprehension of human history is constantly evolving, findings like these remind us of the complex journeys our ancestors undertook. As we continue to unearth their stories, we gain not just insights into their lives but also a deeper perspective on our own existence.
For further context on Homo erectus and its significance in human evolution, you can explore detailed research studies available through Smithsonian’s Human Origins Program.