Ancient DNA gives scientists a time-stamped genetic record of people who lived in the past. By comparing DNA from dated remains with other ancient samples and present-day populations, researchers can test models of relatedness, migration and population mixture. The results can support a history of population movement—but a genome does not contain a map, identify a language or define a person’s cultural identity.
How scientists use ancient DNA to study migration
The process starts with human remains linked to an archaeological site. The remains’ location and estimated age place the genetic evidence in a particular time and place. Researchers then compare recovered DNA with data from other ancient individuals and modern populations.
Those comparisons look for patterns in genetic variation. Statistical models test whether the patterns are consistent with groups sharing ancestry, people moving between regions, or populations mixing or changing over time. A migration route is inferred from the combined evidence; it is not read directly from an individual genome.
- Date and locate the remains. Archaeological context establishes where and when the sampled person lived.
- Recover and analyze DNA. Scientists assess genetic material preserved in the remains. DNA degrades, so usable samples are scarce and unevenly distributed across time and place.
- Compare samples. Ancient genomes are compared with one another and with present-day data to identify patterns of similarity and difference.
- Test population-history models. Researchers evaluate whether proposed relationships, movement or mixture fit the genetic evidence, alongside archaeological and historical context.
The models are hypotheses tested against the samples available. A pattern may support a population movement without showing that every person moved, or establishing a single precise route or date.
#1 Best Overall
- TOP-SELLING CONSUMER DNA TEST: From your origins in over 3,600 places around the world to the most connections to living relatives, no other DNA test kit delivers an experience as unique and interactive as AncestryDNA.
- YOUR DATA, YOUR CONTROL: We give you full control over your genetic information. You decide what to share, and with whom.
- A FEW SIMPLE STEPS: Simply activate your DNA kit online and return your saliva sample in the prepaid package to our state-of-the-art lab. Your results will be available online in roughly six weeks.
- ORIGINS AND INHERITANCE: AncestryDNA provides more precise ancestral origins with greater geographic detail. Our innovative SideView technology takes your results even further by showing your origins and matches by parental side. *Some DNA features require an Ancestry subscription.
- BUILD YOUR FAMILY TREE: Combine what you learn from your DNA results with an Ancestry subscription and gain access to millions of family trees and the world's largest collection of online family history records. *Access to record collections varies depending on subscription level.
What different kinds of DNA can reveal
Mitochondrial DNA traces one maternal line
Mitochondrial DNA is inherited through the biological maternal line, so it can help trace that particular lineage. It represents only one narrow strand of a person’s ancestry and cannot by itself describe the history of all a person’s ancestors.
Genome-wide data can address broader population histories
Genome-wide data provide many more genetic comparisons than a single maternal lineage. They can help researchers examine relationships among populations and test models involving migration, mixture and population change. Their conclusions still depend on which people were sampled and on the model used to interpret the data.
Rank #2
- TOP-SELLING CONSUMER DNA TEST: From your origins in over 3,600+ places around the world to the most connections to living relatives, no other DNA test kit delivers an experience as unique and interactive as AncestryDNA.
- YOUR DATA, YOUR CONTROL: We give you full control over your genetic information. You decide what to share, and with whom.
- DNA + TRAITS: Ever wondered where your freckles came from, or why you hate cilantro? AncestryDNA + Traits lets you discover 75+ genetic traits, allowing you to explore how your genes might have influenced a range of appearance, sensory, performance, nutrient, and other personal characteristics.
- A FEW SIMPLE STEPS: Simply activate your DNA kit online and return your saliva sample in the prepaid package to our state-of-the-art lab. Your results will be available online in roughly six weeks.
- ORIGINS AND INHERITANCE: AncestryDNA is the only DNA test that can show your origins results, DNA matches, and traits by each side of the family, without your parents taking a DNA test.
What ancient-DNA studies have found
These studies address different places, periods and questions. Their sample sizes are not directly comparable: a study of a defined archaeological context and a review of evidence across a continent do not provide the same kind of record.
| Study and scope | Samples described | Finding and what it supports |
|---|---|---|
| Nature, “Ancient DNA connects large-scale migration with the spread of Slavs” (2025), Central and Eastern Europe, with findings concerning the sixth to eighth centuries CE | 555 ancient individuals, including 359 from Slavic contexts dating as early as the seventh century CE | The study reports large-scale movement from Eastern Europe. It estimates more than 80% replacement of the local gene pool in Eastern Germany, Poland and Croatia, while also reporting substantial regional heterogeneity. This is a result for the regions and period described by the study, not a claim that all localities or social groups changed identically. |
| Nature, “Peopling of the Americas as inferred from ancient genomics” (2021), the Americas | Not stated in the review summary. | The review describes dispersal from northeast Asia involving distinct populations, followed by rapid expansion south of the continental ice sheets and branching into multiple populations. It presents a complex, episodic history rather than one uncomplicated wave. |
| “Ancient human genomes suggest three ancestral populations for present-day Europeans” (2014), Europe | Not stated in the study summary. | The study modeled present-day European ancestry as deriving from at least three differentiated ancient populations: western European hunter-gatherers, ancient north Eurasians and early European farmers. |
| Nature, “The genetic history of Ice Age Europe” (2016), Europe, approximately 45,000–7,000 years ago | 51 people dated to approximately 45,000–7,000 years ago | The study reports recurring migration and population turnover across the period it examined. |
| Nature, “Ancient DNA and deep population structure in sub-Saharan African foragers” (2022), eastern and south-central Africa | Six individuals spanning approximately 18,000 years, alongside previously published samples | The data show patterns consistent with deep population structure and past mobility. The geographic coverage and sample count do not amount to a complete account of African population history. |
How to understand ancestry and population change
Migration, mixture and population turnover are related but distinct interpretations. Evidence that ancestry patterns changed in a region may support movement into it, mixture with people already there, or replacement of some ancestry over time. Which interpretation fits depends on the samples, dates, models and other evidence—not on one percentage in isolation.
Rank #3
- MAP YOUR ORIGINS ACROSS 5,000+ REGIONS: Ancestry Composition breaks down your ethnicity across 5,000+ geographic regions worldwide, the most detailed ancestry breakdown of any consumer DNA service. Ancestry Timeline estimates how many generations ago your most recent ancestor from each population lived.
- FIND LIVING RELATIVES: Opt in to DNA Relatives to see up to 1,500 people in the 23andMe database who share DNA with you, from close family to distant cousins, and message them directly. Your Family Tree builds itself automatically based on your DNA.
- DISCOVER WHAT MAKES YOU UNIQUE: See how your DNA may influence physical features, sensory preferences, and habits across 30+ traits, including cilantro taste aversion to hair texture to deep sleep.
- TRACE ANCIENT MIGRATIONS: Maternal and Paternal Haplogroup reports follow your ancestors' migration paths across continents over thousands of years (paternal haplogroup requires a Y chromosome). Find out how much of your ancestry can be traced back to the Neanderthals.
- PRIVATE BY DESIGN: Your DNA data is encrypted, protected, and always under your control. Enhanced security measures are implemented to keep your information safe. Subject to 23andMe’s Terms of Service and Privacy Statement at 23andMe online.
For example, the 2025 Central and Eastern European study links large-scale movement in the sixth to eighth centuries with the spread of Slavs, but its finding of regional heterogeneity matters: the reported change was not uniform everywhere. Archaeological and historical context helps researchers interpret genetic patterns without treating genetic ancestry as proof of a particular language, custom or identity.
What ancient DNA cannot establish on its own
- A precise route: Genetic similarities across places and periods can support movement models, but a genome does not record the route a person or population took.
- A language or culture: Genetic ancestry does not independently establish what language people spoke, what practices they followed or how they identified.
- A complete history: DNA preservation and sampling are uneven. A missing region or period in the evidence is not evidence that no movement occurred there.
- A fixed identity for an individual: Population-level ancestry estimates describe patterns in sampled groups and should not be treated as labels that define a person.
What Neanderthal ancestry shows
The Smithsonian Institution’s Human Origins Program summarizes estimates of about 1–4% Neanderthal ancestry in non-African present-day populations, with variation by region. It also describes evidence of Neanderthal ancestry among African Homo sapiens. These are population-level findings about interbreeding in human history, not an individual identity category or a single percentage that applies equally to everyone.
Rank #4
- Connect with Relatives - Our DNA test kit is equipped with interactive tools that track your genealogy, trace your lineage, and determine family connections. With our Family Matching and Chromosome Browser features, connect with your genetic relatives across the globe while also comparing the DNA segments that you share.
- Explore Your Genetic History - Explore your origins further using the myOrigins Chromosome Painter feature. The myOrigins Chromosome Painter uses colors representing the populations in your myOrigins results to paint segments of your genome. Use the Chromosome Painter to see where each DNA segment in your ancestry comes from.
- Explore Your Ancient Roots - Our DNA ancestry test kit unravels your ancient DNA and history. With ancientOrigins, find out the amount of autosomal DNA you carry from ancient European groups: Neolithic Hunter/Gatherers, Early Farmers, and Bronze-age Metal Invaders.
- Convenient Self-Test Kit - Collect your samples in the comfort of your home! This non-invasive ancestry testing kit only requires a simple cheek swab. After extraction, mail your kit back using our return shipping envelope or, for US residents, our prepaid return shipping label.
- Trusted and Secured Testing - Our DNA & ancestry tests are covered by our data privacy and terms of service policies. The DNA kit findings are also processed in our in-house laboratory by our team of experts.
Ancient-DNA findings also concern human remains and genetic information with connections to descendant communities. The cited studies and summaries do not establish one universal consent or governance protocol, so ethical questions must be considered in the context of the specific research and communities involved.
Quick Recap
Best Value
- TOP-SELLING CONSUMER DNA TEST: From your origins in over 3,600 places around the world to the most connections to living relatives, no other DNA test kit delivers an experience as unique and interactive as AncestryDNA
- YOUR DATA, YOUR CONTROL: We give you full control over your genetic information. You decide what to share, and with whom.
- FAMILY HISTORY MEMBERSHIP: The 3-month “World Explorer” membership gives you access to billions of family history records. The membership is redeemable during the AncestryDNA activation process only by the person activating the AncestryDNA test. The person redeeming the membership may choose to convert to an auto-renewing membership by submitting valid billing information.
- BUILD YOUR FAMILY TREE: Combine what you learn from your DNA results with an Ancestry subscription and gain access to millions of family trees and the world's largest collection of online family history records.
- ORIGINS AND INHERITANCE: AncestryDNA is the only DNA test that can show your origins results, DNA matches, and traits by each side of the family, without your parents taking a DNA test.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
