A civilization that rivaled modern engineering standards vanished without a trace, leaving behind only silent ruins and an unreadable script. We dive into the investigation of why this advanced society collapsed so abruptly, examining the gap between its sophisticated life and its mysterious end.

This discussion explores the physical evidence of Mohenjo-daro, from defensive walls designed to block rising rivers to the controversial claims of radioactivity found in ancient skeletons. We contrast the high-level urban planning of the Indus Valley with the suddenness of the city's ruin.

• Unprecedented infrastructure including 10-foot wide roads and advanced waterproofing.
• Strategic use of defensive barriers and elevated storage to manage environmental threats.
• Claims of radiation levels in ancient remains used as evide ...