A Prehistoric Wooden Structure Preserved by River SedimentsThe wooden remains were found buried in river sediments, where they were protected from the effects of oxygen that normally accelerate decay. The Kalambo Falls discovery differs because it shows multiple wooden pieces combined to create a structure rather than a single modified object. Scale bars, 10 cm – © NatureAn Unknown Hominin Created the Interlocking LogsThe identity of the hominin responsible for making the wooden structure remains unknown. The underlying log passes through a central notch cut into the upper log (object 1033) and extends into the section. The preservation of Kalambo Falls continues to provide rare information about prehistoric activity.