BBC: Scientists are to scan the Amazon forest in Brazil to look for evidence of occupation by ancient civilisations.
A drone will be sent up with a laser instrument to peer through the canopy for earthworks that were constructed thousands of years ago.
The UK-led project is trying to determine how big these communities were, and to what degree they altered the landscape.
The data is likely to inform policies on sustainable forest use today.
Researchers announced the initiative at the annual...