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</html><thumbnail_url>https://blog.familytreedna.com/wp-content/uploads/2025/11/Worlds-Largest-mtDNA-Haplotree-FamilyTreeDNA-Blog.png</thumbnail_url><thumbnail_width>1200</thumbnail_width><thumbnail_height>630</thumbnail_height><description>The Updated mtDNA Tree of Humankind has expanded again, adding more than 12,700 new maternal haplogroups. This update deepens global mtDNA coverage and enhances maternal lineage research for genealogists and scientists alike.</description></oembed>
