What does our DNA actually say about who we are as Indians? At PondyLitFest 2025, host Alo Pal sits down with Dr. Niraj Rai — one of India's leading population geneticists with over 15 years of experience — for a fascinating and frank conversation about what ancient DNA is revealing about our past, our health, and our identity.
Dr. Rai breaks down the science behind human migration into and out of India over the last 10,000–15,000 years, explains what the Harappan genome has revealed about the shared ancestry of all Indians (North and South), and challenges long-held colonial theories about the Aryan Invasion.
He also sounds the alarm on a growing but underreported public health crisis: the genetic consequences of endogamy and cousin marriage practices that have intensified over the last 1,000 years — including a gene mutation found only in South Asians that puts 5% of Indians at higher risk of heart attacks, detectable for just ₹100.
This is a must-watch for anyone interested in India's real history, population genetics, and the intersection of science, culture, and public health.
Topics Covered:
Migration as a natural phenomenon & India's 15,000-year genetic history
What the Harappan genome tells us about North & South Indians
The Aryan Invasion Theory — what the data actually says
Ancestral South Indians (ASI) & Ancestral North Indians (ANI)
Ancient communities like the Toda and their genetic isolation
The caste system's genetic origins — only ~1,000 years old
Endogamy and first-cousin marriage: a looming health crisis
Genetic bottlenecks and their impact on Indian populations
A heart-attack gene found only in Indians — and a ₹100 test to detect it
Why Indian history textbooks need to be rewritten
Speakers:
Dr. Niraj Rai — Population Geneticist, Ancient DNA Researcher
Alo Pal — Host, PondyLitFest 2025
🎙️ Recorded at the sidelines of PondyLitFest 2025

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