Archaeologists discover oldest wooden structure
How do they know the wood was used 476,000 years ago, as opposed to a human 6000 years ago finding and using some 470,000 year old wood? This gives a hint:<p>> They used new luminescence dating techniques, which reveal the last time minerals in the sand surrounding the finds were exposed to sunlight, to determine their age.<p>... but it seems like there might be other explanations for that sand being there?