I use radiogenic isotopes as tools to understand the Earth processes. I have been teaching at Pondicherry University since 2002 and have about three decades of research experience. I have been lucky to have worked in almost all geological terranes, ranging from the oldest rocks in the Dharwar craton to the youngest volcanic rocks in the Barren Island, and geographically from Ladakh in the north to Tamil Nadu in the south and Maharashtra in the west to Manipur in the northeast.