The ancient peoples of the Philippines and of Island Southeast Asia (ISEA) may have built sophisticated boats and mastered seafaring tens of thousands of years ago—millennia before Magellan, Zheng He, and even the Polynesians were able to match their feats.
In a paper published in the Journal of Archaeological Science, Ateneo de Manila University researchers Riczar Fuentes and Alfred Pawlik challenge the widely-held contention that technological progress during the Paleolithic only emerged in Europe and Africa.
The researchers pointed out that much of ISEA was never connected to mainland Asia, neither by land bridges nor by ice sheets. Yet it has yielded evidence of early human habitation, more than enough to establish that people reached these islands long ago.
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“While the presence of fossils and artifacts provide ample evidence that early modern humans were able to cross the open sea, the very circumstances of why and how they moved into and across Island Southeast Asia (ISEA) remain to be addressed,” the study authors wrote. “In this paper we explore the connection between traces of plant working and boatbuilding in coastal sites during the Pleistocene to infer how prehistoric people migrated to and through the region.”
A Prehistoric Seafaring Mystery Solved?
Exactly how these peoples achieved such daring ocean crossings is an enduring mystery, as organic materials like wood and fiber used for boats rarely survive in the archaeological record. This is especially a problem in tropical climates, where rates of organic decay are elevated beyond what occurs in higher latitudes.
Island lagoon in Bacuit Bay, Palawan, Philippines, appearing much as it would have appeared 40,000 years ago. (Vyacheslav Argenberg/CC BY-SA 4.0).
Nevertheless, archaeological sites in the Philippines, Indonesia, and Timor-Leste are now providing strong evidence that ancient seafarers had a technological sophistication comparable to much later civilizations, including those located in other parts of the globe.
Microscopic analysis of stone tools excavated at these sites, some of which date as far back as 40,000 years ago, showed clear traces of plant processing—particularly the extraction of fibers necessary for making ropes, nets, and bindings essential for boatbuilding and open-sea fishing.
Archaeological sites in Mindoro and Timor-Leste also yielded the remains of deep ocean fish such as tuna and sharks, as well as fishing implements such as fishing hooks, gorges, and net weights. These species simply couldn’t have been harvested in boats suitable only for shallow waters close to shore, meaning that ancient fishing boats must have been durable enough to venture out into deeper and rougher waters.
"The remains of large predatory pelagic fish in these sites indicate the capacity for advanced seafaring and knowledge of the seasonality and migration routes of those fish species," the researchers wrote in their paper. Meanwhile, the discovery of fishing implements "indicates the need for strong and well-crafted cordage for ropes and fishing lines to catch the marine fauna."
This body of evidence points to the likelihood that these ancient seafarers built sophisticated boats out of organic composite materials held together with plant-based ropes, and also used the same rope technology for open-sea fishing. They wouldn’t have been able to develop such an advanced and ambitious plan for harvesting fish without such advancements, allowing researchers to infer that they possessed significant skills and knowledge in this area.
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If this is so, then prehistoric migrations across the waters separating the ISEA outposts would not have been undertaken by mere passive sea drifters on flimsy bamboo rafts. Instead, these journeys would have been meticulously planned and expertly implemented by highly skilled navigators equipped with the knowledge and technology to travel vast distances and to reach remote islands out in the deepest waters.
Diagram tracing development of plant-working technology in ancient human habitations across Island Southeast Asia, which suggests prehistoric peoples of the Philippines and their neighbors possessed both sophisticated seacraft and advanced maritime skills. (Fuentes and Pawlik/Journal of Archaeological Science).
The very first new discoveries of previously unexplored islands may have come about by accident. But once the ancient inhabitants knew such islands were out there, their search for them would have become organized and intentional, which would only have been possible if they knew a lot about boat-building and long-distance sea travel.
Testing the Hypothesis
Several years of fieldwork on Ilin Island, Occidental Mindoro, inspired the researchers to think about this topic and to test their hypothesis about the boat construction activities of the ancients. Together with naval architects from the University of Cebu, they recently started the First Long-Distance Open-Sea Watercrafts (FLOW) Project, with the aim of testing raw materials that were probably used in the past, and to design and test scaled-down seacraft models to confirm they were seaworthy and compatible with widespread ocean exploration.
The presence of such advanced maritime technology in prehistoric ISEA highlights the ingenuity of early Philippine peoples and their neighbors, whose boat-building knowledge likely made the region a center for technological innovations tens of thousands of years ago, and laid the foundations for the maritime traditions that still thrive in the region today.
Top image: AI-generated image of ancient boat sailing the Pacific Ocean.
Source: Waikiki Beach Services.
This is an edited version of a press release published by Ateneo Manila University, entitled ‘Clues of Advanced Ancient Technology Found in the Philippines and Island Southeast Asia.’
