How ancient quakes and monsoons forced mass migrations

A 3.3-meter trench into UP's dried-up Sahaswan oxbow lake has unlocked a 4,500-year history, a new study shows. Joint research from IIT's and IISER Kolkata shows that underground tectonic activity along the Hathras-Sirauli Fault in the Central Ganga Basin, combined with erratic monsoon rains, alters India's agricultural heartland.