A new genetic technique just uncovered stretches of DNA in modern humans that do not match any known ancestor, not Neanderthal, not Denisovan, not anything on record. Dr. Samantha Yammine explains how researchers managed to date something this old without ever holding a physical sample of it.

Samantha breaks down what actually makes a stretch of DNA look ancient, using the number of small copying mistakes it carries as a kind of clock. What those mystery genes might have actually done for the people who carried them, though, is still an open question.

She also connects this to Neanderthal interbreeding, and why some ancient traits stuck around while entire species disappeared. It reframes what carrying "ancient" DNA even means.

Topics: ghost ancestor DNA, ancient DNA technique, Neanderthal, Denisovan, human evolution

GUEST: Dr. Samantha Yammine | http://samanthayammine.com | @‌science.sam

Originally aired on 2026-08-31

A new genetic technique just uncovered stretches of DNA in modern humans that do not match any known ancestor, not Neanderthal, not Denisovan, not anything on record. Dr. Samantha Yammine explains how researchers managed to date something this old without ever holding a physical sample of it.
Samantha breaks down what actually makes a stretch of DNA look ancient, using the number of small copying mistakes it carries as a kind of clock. What those mystery genes might have actually done for the people who carried them, though, is still an open question.
She also connects this to Neanderthal interbreeding, and why some ancient traits stuck around while entire species disappeared. It reframes what carrying "ancient" DNA even means.
Topics: ghost ancestor DNA, ancient DNA technique, Neanderthal, Denisovan, human evolution
GUEST: Dr. Samantha Yammine |<a href="http://samanthayammine.com"> http://samanthayammine.com</a> | @&zwnj;science.sam
Originally aired on&nbsp;2026-08-31

Shane Hewitt & The Nightshift is your late-night companion for real talk, bold ideas, and unfiltered conversations that matter. Hosted by Canadian radio veteran Shane Hewitt, each episode dives into the headlines, human stories, and hidden truths shaping our world—always with curiosity, compassion, and a sharp edge.

From politics and pop culture to mental health, technology, and everyday life, this podcast is where night owls, deep thinkers, and curious minds come to connect. Featuring expert guests, passionate callers, and Shane’s signature style—thoughtful, fearless, and refreshingly real.

If you crave meaningful dialogue, smart perspectives, and late-night radio energy in podcast form, subscribe now and join The Nightshift.

Shane Hewitt &amp; The Nightshift is your late-night companion for real talk, bold ideas, and unfiltered conversations that matter. Hosted by Canadian radio veteran Shane Hewitt, each episode dives into the headlines, human stories, and hidden truths shaping our world&mdash;always with curiosity, compassion, and a sharp edge.
From politics and pop culture to mental health, technology, and everyday life, this podcast is where night owls, deep thinkers, and curious minds come to connect. Featuring expert guests, passionate callers, and Shane&rsquo;s signature style&mdash;thoughtful, fearless, and refreshingly real.
If you crave meaningful dialogue, smart perspectives, and late-night radio energy in podcast form, subscribe now and join The Nightshift.

Shane Hewitt and The Nightshift

Shane Hewitt is known for his engaging and relatable on-air personality, which captivates listeners. His ability to blend insightful commentary with humour and empathy creates a genuine connection with listeners.  Shane Hewitt and the Night Shift provides relatable content, informative discussions and expert insights – along with a balance of anecdotes and entertainment.

Shane Hewitt is known for his engaging and relatable on-air personality, which captivates listeners. His ability to blend insightful commentary with humour and empathy creates a genuine connection with listeners.  Shane Hewitt and the Night Shift provides relatable content, informative discussions and expert insights – along with a balance of anecdotes and entertainment.