woodruff: from peru, special correspondent steve sapienza reports on illegal gold mining in the remote rainforest of the amazon. right behind us here is a former mining pit that has been filled in with water. all the nutrients have been taken out of the soil. as far as you can see into the distance, this entire area has been turned into a desert. suarez: and jeffrey brown talks to neil macgregor about his new book recounting the history of civilization, told through 100 treasures from the british museum. the rosetta stone, nobody ever thought that they would provide the code for hieroglyphics. that never crossed their mind. they mean different things as time goes on. woodruff: that s all ahead on tonight s newshour. major funding for the pbs newshour has been provided by: in cars to retail signs to hospitals creating new, enriching experiences. through intel s philosophy of invest you for the future we re helping to bring these new capables to market. we re investin