Researchers have unearthed the oldest known wooden structure in Zambia, and it’s almost half a million years old, according to a new study.

“At the very least, they’re putting a huge amount of effort into this place,” he said. The wooden structure has no real parallel in the archaeological record, according to the study.

(CNN) — Archaeologists have unearthed the oldest known wooden structure, and it’s almost half a million years old.