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DNA test on Thomas Jefferson’s hair provides ‘extraordinary proof’ he fathered kids with slave Sally Hemings — other chilling other breakthroughs

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Blair, A. (2026, September 20). DNA test on Thomas Jefferson’s hair provides ‘extraordinary proof’ he fathered kids with slave Sally Hemings — other chilling other breakthroughs. New York Post. https://nypost.com/2026/09/20/us-news/thomas-jefferson-dna-test-proof-he-fathered-kids-with-slave/

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New York Post · collected 2026-09-20 · by Anthony Blair

Quick Summary

Researchers at the Smithsonian Institution have used advanced DNA testing on Thomas Jefferson's hair to provide “extraordinary proof” that he fathered children with Sally Hemings, a slave owned by him. The study, conducted over 15 years and detailed in the New York Times, involved comparing genetic material from Jefferson’s hair with samples from 13 living descendants believed to be related to both Jefferson and Hemings. This breakthrough not only confirms historical speculation but also demonstrates the forensic power of modern DNA analysis techniques that have since been applied to solve high-profile criminal cases like those of Rex Heuermann and the Golden State Killer.
Written by AI on 2026-09-21, from this article's own text only (the story summary below draws on all the coverage).

AI analysis

Story summary

Researchers at the Smithsonian Institution have provided "extraordinary proof" that Thomas Jefferson fathered children with Sally Hemings, a slave he owned. After 15 years of work involving archaeologists, genealogists, molecular geneticists, and historians, they compared DNA from hair strands believed to be Jefferson's with samples from descendants of both Jefferson and Hemings. The study used 20,000 simulations to analyze the paternity scenarios, finding the odds that Jefferson was not the father of Hemings' sons Madison or Eston were less than one in 1,000. This discovery adds a significant layer to debates about slavery, race, and Jefferson's legacy, as he is known for writing "All men are created equal," despite the paradoxical reality if his relationship with Hemings is confirmed.

Written for “Jefferson Hemings DNA Evidence” on 2026-11-04, grounded in this article and the 1 other(s) covering the same event.

Story

📰 Jefferson Hemings DNA Evidence
Politics · 2 article(s) covering the same event. See how they differ ↓

Compared with similar articles

This article reads unscored and hedges 11% of its claims. Each row says how that neighbour differs.
NPR
Hedges 3 of 42 claims Outlet record 60/100
How this article was measured signals, leaning charts, publisher record, byline, topics and claims

Signals How these are calculated →

Claims extracted
19
sentences that state something as happening or true
Uncertain
11%
2 of 19 hedged ("reportedly", "may", "according to")
Leaning
not political
takes no side on a contested political question
Publisher signals
66/100
New York Post's corrections and hedging, across everything collected from it. Not a measure of accuracy.
Outlets on this story
2
Politics
Same framing elsewhere
1
articles that frame the event the way this one does
Analyzed 2026-09-21 · how these are computed

How this is being covered How these are calculated →

Article leaning vs. publisher reliability
Source leaning vs. consistency

Publisher

New York Post · 16821 article(s) · 36 correction(s) detected
Running correction rate · 36 correction(s)

Who wrote this

Anthony Blair
98 article(s) here · 1 carrying a prediction
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Also by Anthony Blair
Nothing else under this byline is closely related to this article, so these are simply their most recent.
All 98 articles by Anthony Blair →

Topics

American Gilgo Beach Smithsonian the Smithsonian Institution the United States’

Subjects

Jefferson PERSON · 11× Hemings PERSON · 4× Kurin PERSON · 4× Smithsonian ORG · 4× Gilgo Beach GPE · 3× American NORP · 2× Randolph PERSON · 2× Rex Heuermann PERSON · 1× Sally Hemings PERSON · 1× Thomas Jefferson’s PERSON · 1×

Narrative

That hair proved to be a match and led to the sequencing of Jefferson’s entire genome, using extraordinary new techniques. Biologists also ran 20,000 simulations of each paternity scenario involving Jefferson, his brother Randolph, who has long been put forward as one of the most likely other candidates to have fathered children with Hemings, and Randolph’s sons. The odds that Jefferson didn’t father either of Hemings’ sons, Madison or Eston, were less than one in 1,000, the study found.
framing: assertive · carried by 1 article(s) · first seen 2026-09-21
🔮 “Other people may have other ideas, and I don’t think there’s necessarily an institution position, but I think it’s compelling.

Claims (19 extracted, 2 hedged)

Cutting-edge DNA tests on Thomas Jefferson’s hair have provided “extraordinary proof” he sired children with slave Sally Hemings — and the process bizarrely also helped nail serial killers such as Rex Heuermann. asserted
process → cut → Heuermann
Researchers at the Smithsonian Institution compared the genome sequence in a few strands of hair from the head of the United States’ third president with DNA samples from 13 people believed to be the living descendants of Jefferson and Hemings, the New York Times reported. asserted
Times → compare → Jefferson
Speculation that Jefferson had children with his slave has swirled since the early 19th century, but now, after 15 years of work, the team of archaeologists, genealogists, molecular geneticists and historians say they have proven the link. asserted
they → swirl → link
“Other people may have other ideas, and I don’t think there’s necessarily an institution position, but I think it’s compelling. uncertain
it → have → ideas
It’s very clear,” Smithsonian scholar Richard Kurin, who led the project, said of the findings while promoting his new book. asserted
who → ’ → book
I didn’t invent this question, and it wasn’t invented by the Smithsonian. asserted
it → invent → Smithsonian
It goes back to [Alexander] Hamilton and Jefferson and [John] Adams,” Kurin said, referring to some of the nation’s Founding Fathers. asserted
Kurin → go → Fathers
“If we have evidence, scholarship and science that helps elucidate American history, I think we have a duty to pursue it.” asserted
we → have → it
The groundbreaking techniques used to sequence Jefferson’s entire genome have also now been since used to solve Long Island’s Gilgo Beach murders and those of the infamous Golden State Killer. asserted
techniques → use → Killer
“It’s hard to say we ever would have gotten to this place, where all these tools were used to convict the Gilgo Beach serial killer, if it hadn’t been for starting this project,” said Beth Shapiro, an expert in ancient DNA at the University of California, Santa Cruz. asserted
Shapiro → ’ → California
Gilgo Beach serial killer Heuermann was done in partly by DNA recovered from a pizza crust he tossed outside his Manhattan architecture office, while Golden State Killer Joseph DeAngelo got nailed with the help of family geneology websites. asserted
DeAngelo → do → websites
The Jefferson gene project was started in 2011 when Kurin was previewing a Smithsonian documentary about Jefferson’s personal Bible, which he created by cutting out passages containing Jesus’ moral teachings and pasting them into a new book. asserted
he → start → book
In the search for any traces of blood that the author of the Declaration of Independence may have left on the pages, Kurin instead found three hairs. uncertain
Kurin → leave → hairs
They were examined against a sample obtained from a female-line descendant of Jefferson’s mother and found to not be a match, so that led investigators down another path involving strands from a lock of hair believed to have been clipped from Jefferson’s head as he lay on his deathbed at Monticello in 1826. asserted
he → examine → 1826
That hair proved to be a match and led to the sequencing of Jefferson’s entire genome, using extraordinary new techniques. Biologists also ran 20,000 simulations of each paternity scenario involving Jefferson, his brother Randolph, who has long been put forward as one of the most likely other candidates to have fathered children with Hemings, and Randolph’s sons. The odds that Jefferson didn’t father either of Hemings’ sons, Madison or Eston, were less than one in 1,000, the study found. asserted
study → prove → 1,000
This month, one Hemings descendant who gave a DNA sample in 2015 asked to withdraw her participation over frustrations that Kurin’s book was appearing before a related article had been published in a scientific journal. asserted
article → give → journal
That sample and the related data were destroyed, and the analysis reran without her, the Smithsonian confirmed. asserted
Smithsonian → relate → her
David Miller, a sixth-generation descendant of Jefferson whose mother, Sarah Coachman Miller, provided a DNA sample, said he welcomed the results, which confirmed what he already believed. asserted
he → provide → what
His mother died before the results came out, but through the project, Miller was able to connect with his “cousins,” the Hemingses, he said. “It’s positive the family now hopefully gets the recognition and acknowledgement and acceptance they deserve,” he told the Times. asserted
he → die → Times
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