Chicago-sized iceberg A-84 breaks away from Antarctica: Scientists warn melting ice could raise sea level and threaten coastal cities from New York to Mumbai

A massive iceberg named A-84 calved from Antarctica, revealing a hidden marine ecosystem. Scientists investigated the newly exposed seafloor using a high-tech underwater robot. This discovery showed a colourful landscape of diverse marine life thriving for centuries. The iceberg's breakaway also highlights the alarming rate of Antarctic ice melt. Understanding these changes is critical for predicting future sea level rise.