Ntiaj teb thawj zaug siv nanotech yog hauv Is Nrias teb, 2,600 xyoo dhau los!
Nyob rau hauv 2015, nyob rau hauv ib tug nondescript lub zos nyob ib ncig ntawm 450km ntawm Chennai, Is Nrias teb tau pom cov seem ntawm lub nroog uas rov qab mus rau 3rd-6th caug xyoo BCE. Tam sim no, hauv cov khoom tawg…