Wallacean hominids

Archaeologists have discovered ancient stone tools on Indonesia’s Sulawesi island, pushing back the timeline of human presence in the Wallacea region by nearly 500,000 years.

• The small, chipped tools, found in the Soppeng region of South Sulawesi, were dated using radioactive tracing to be up to 1.48 million years old. This discovery is significant because it challenges long-held theories about early human migration and capabilities.

Reshaping Migration Theories

• Prior to this find, it was widely believed that the earliest human relatives, a prehistoric species known as Homo erectus, were incapable of long-distance sea travel. They were thought to have settled on other Wallacean islands like Flores and Luzon around 1.02 million years ago.

• However, the discovery of these tools on Sulawesi—an island separated by deep ocean channels even during periods of low sea level—suggests that Homo erectus either developed seafaring abilities much earlier than previously thought, or managed to cross the marine barrier through incidental means, such as drifting on natural rafts of vegetation.

Key Findings of the Discovery

• The stone tools, described as “simple, sharp-edged flakes,” were likely used for cutting animals and carving rocks.
• The artifacts were found alongside the fossilized teeth of ancient pig-like animals, which helped confirm the dating of the site.
• The findings were published in the journal Nature by a team of archaeologists from Griffith University in Australia, led by Professor Adam Brumm, and the National Research and Innovation Agency of Indonesia (BRIN), led by senior archaeologist Budianto Hakim. The discovery adds to the intriguing puzzle of human evolution in the Wallacea region, which also includes the fossils of the diminutive Homo floresiensis (the “hobbits”).