Qualla: Kilu Cave

Kilu Cave: Introduction

Thu, 16 Apr 2026 00:00:00 GMT

Sixty kilometres of empty ocean. That is the distance between Nissan Island and the shelter of Buka's limestone cliffs, too wide for even the clearest day to bridge with the eye, and it was crossed at least 29,000 years ago by someone who could not have known the land on the other side existed. The proof of the crossing sits inside a cave at the base of a limestone cliff 65 metres from what is now Buka's shoreline, in the Autonomous Region of Bougainville. Kilu Cave is a small site by the standards of famous archaeology, no painted walls, no monumental burials. What it holds is the oldest evidence anywhere of humans navigating open water without sight of land. They could not have seen where they were going. They went anyway.

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Kilu Cave: A Line That Nobody Walked

Thu, 16 Apr 2026 00:00:00 GMT

Our species walked out of Africa and spread across Eurasia on feet, stopped at the edge of water, and eventually crossed it. The Wallace Line, the invisible biogeographic boundary that runs between Bali and Lombok, marks where the animals of Asia end and the animals of Australia ...

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Kilu Cave: What They Ate

Thu, 16 Apr 2026 00:00:00 GMT

The layers at Kilu Cave read like a menu for people who knew their coast. Shark bones make up the largest share of the fish remains, with a striking 20 percent of the Pleistocene fish bones coming from pelagic species, the tuna family, dolphinfish, and jacks that swim in deep wat...

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Kilu Cave: The First Garden

Thu, 16 Apr 2026 00:00:00 GMT

Here is what makes Kilu unusual among paleolithic sites in Melanesia, perhaps anywhere. On seventeen of the stone tools from the Pleistocene layer, archaeologists found starch grains from taro, both Colocasia and Alocasia varieties. They also found evidence for galip nut, Canariu...

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Kilu Cave: The Silent Millennia

Thu, 16 Apr 2026 00:00:00 GMT

Then, around 20,000 years ago, people stopped visiting the cave. The occupation goes quiet for a long time, not because the people disappeared, but because the shoreline they had relied on moved. As sea levels rose, Kilu found itself stranded further from the coast, and the marin...

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Kilu Cave: A Cave Full of Firsts

Thu, 16 Apr 2026 00:00:00 GMT

Kilu Cave is simultaneously the oldest known human site in the Solomon Islands archipelago, the oldest proof of paleolithic open-ocean navigation, and the longest documented paleolithic sea crossing. It is the only site in Melanesia with direct evidence for plant use by the initi...

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