A pair of crossed logs in Zambia may be the oldest evidence of early humans building with wood.
In this photo provided by researchers, an excavation team uncovers a wooden structure found on a riverbed near a waterfall in Zambia in 2019. The pair of crossed logs may be the oldest evidence of early humans building with wood, nearly half a million years old, according to a study published Wednesday, Sept. 19, 2023 in the journal Nature. – Researchers have uncovered a simple structure from the Stone Age that may be the oldest evidence yet of early humans building with wood.
Barham and his team dug up the log structure — plus a handful of wooden tools — from a riverbed site that sits above a waterfall in Zambia. They think the crossed logs could have been the base for a bigger structure like a walkway or a platform. So when his team uncovered the logs in 2019, they were still able to see telltale signs that early humans had shaped them — carving out a notch in the upper log, tapering off the ends and leaving tool marks across the surface.Figuring out just how old posed its own challenge, since traditional dating techniques couldn't get deep enough into the past.
They would have been made by another kind of early human cousin — possibly Homo heidelbergensis, which was around in Africa at the time, authors said.
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