{"id":74375,"date":"2026-05-20T20:19:04","date_gmt":"2026-05-20T14:49:04","guid":{"rendered":"https:\/\/www.nextias.com\/ca\/?p=74375"},"modified":"2026-05-20T20:21:08","modified_gmt":"2026-05-20T14:51:08","slug":"evolution-last-10000-years","status":"publish","type":"post","link":"https:\/\/www.nextias.com\/ca\/current-affairs\/20-05-2026\/evolution-last-10000-years","title":{"rendered":"Human Evolution in the Last 10,000 Years"},"content":{"rendered":"\n<p><strong>Syllabus: GS3\/ Science and Technology<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Context<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A major study led by scientists analysed ancient and modern human genomes to understand how humans evolved during the last 10,000 years.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What is Ancient DNA?<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ancient DNA refers to genetic material extracted from <strong>skeletal remains, teeth, and bones of humans <\/strong>who lived thousands of years ago.<\/li>\n\n\n\n<li>Scientists sequence this DNA and compare it with modern genomes to understand human migration, evolutionary adaptations, disease susceptibility and changes in physical and behavioural traits.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Carbon Dating<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Scientists use<strong> Carbon-14<\/strong> dating to <strong>determine the age <\/strong>of ancient skeletal remains.<\/li>\n\n\n\n<li>Carbon-14 is a<strong> radioactive isotope<\/strong> formed by interaction between cosmic rays and atmospheric nitrogen.<\/li>\n\n\n\n<li>The amount of Carbon-14 decreases after death because radioactive decay converts it back into nitrogen. It has a half-life of 5,730 years.<\/li>\n\n\n\n<li>Scientists use mass spectrometers to measure isotope ratios and estimate the age of remains.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Major Findings of the Study<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Continuing Natural Selection: <\/strong>The study found that natural selection continued to shape human evolution during the last <strong>10,000 years.<\/strong>\n<ul class=\"wp-block-list\">\n<li>Several genetic variants increased or decreased in frequency because of environmental and disease-related pressures.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Changes in Blood Group Genetics:<\/strong> The frequency of the B blood-group variant increased in Western Eurasia over the last 6,000 years.\n<ul class=\"wp-block-list\">\n<li>The A blood-group variant declined during the same period.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Rise in Coeliac Disease Susceptibility: <\/strong>A variant of the <strong>HLA-DQB1 gene <\/strong>associated with coeliac disease increased significantly over the last <strong>4,000 years.<\/strong>\n<ul class=\"wp-block-list\">\n<li><strong>Gluten consumption triggers immune attacks<\/strong> on the small intestine in affected individuals.<\/li>\n\n\n\n<li>Researchers stated that agriculture alone cannot explain this increase.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Skin Colour: <\/strong>Humans increasingly selected for lighter skin tones around <strong>8,000 years ago.<\/strong>\n<ul class=\"wp-block-list\">\n<li>Lighter skin helped populations living in regions with low sunlight synthesise more <strong>vitamin D.<\/strong><\/li>\n\n\n\n<li><strong>Agricultural diets poor in vitamin D<\/strong> may have strengthened this adaptation.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Evolution of Disease Resistance: <\/strong>The <strong>CCR5-\u220632 gene variant<\/strong> provides resistance against <strong>HIV-1 infection and the frequency<\/strong> of this variant increased thousands of years before HIV emerged.\n<ul class=\"wp-block-list\">\n<li>Ancient infectious diseases likely drove the spread of this protective gene.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Significance of the Study<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Understanding Human Adaptation:<\/strong> The study explains how humans adapted to climate change, diseases, agriculture and dietary transformations. It demonstrates that evolution is a continuous and dynamic process.<\/li>\n\n\n\n<li><strong>Importance for Medical Science: <\/strong>Ancient DNA research improves understanding of immunity, genetic diseases and long-term health patterns.<\/li>\n\n\n\n<li><strong>Relevance for South Asia: <\/strong>South Asians possess ancestry from Iranian farmers, steppe pastoralists, ancient South Indians and East Asian-related populations.\n<ul class=\"wp-block-list\">\n<li>Ancient DNA studies in India can improve understanding of migration, adaptation and disease history.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Concerns<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Risk of Misinterpretation:<\/strong> Genetic findings can be oversimplified or misused to justify racial or cultural superiority.<\/li>\n\n\n\n<li><strong>Limited Geographical Representation:<\/strong> Most ancient DNA studies are concentrated in Europe and Western Eurasia.\n<ul class=\"wp-block-list\">\n<li>Large regions such as South Asia, Africa and Southeast Asia remain underrepresented.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Concluding remarks<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The study demonstrates that human evolution is an ongoing process shaped by climate, diet, disease and environmental pressures.<\/li>\n\n\n\n<li>Ancient DNA research is transforming understanding of human history, health and biological adaptation.<\/li>\n<\/ul>\n\n\n\n<p><strong>Source: <\/strong><a href=\"https:\/\/www.thehindu.com\/sci-tech\/science\/revealed-how-humans-evolved-in-the-last-10000-years-alone\/article70988163.ece#:~:text=Ancient%20genes%\" target=\"_blank\" rel=\"noopener\"><strong>TH<\/strong><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p><strong> Context <\/strong><\/p>\n<li class=\"ms-5\"> A major study led by scientists analysed ancient and modern human genomes to understand how humans evolved during the last 10,000 years. <\/li>\n<p><\/p>\n<p><strong> What is Ancient DNA? <\/strong><\/p>\n<li class=\"ms-5\"> Ancient DNA refers to genetic material extracted from skeletal remains, teeth, and bones of humans who lived thousands of years ago. <\/li>\n<li class=\"ms-5\"> Scientists sequence this DNA and compare it with modern genomes to understand human migration, evolutionary adaptations, disease susceptibility and changes in physical and behavioural traits. <\/li>\n<p><a href=\" https:\/\/www.nextias.com\/ca\/current-affairs\/20-05-2026\/evolution-last-10000-years \" class=\"btn btn-primary btn-sm float-end\">Read More<\/a><\/p>\n","protected":false},"author":15,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[21],"tags":[],"class_list":["post-74375","post","type-post","status-publish","format-standard","hentry","category-current-affairs"],"acf":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/posts\/74375","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/users\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/comments?post=74375"}],"version-history":[{"count":3,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/posts\/74375\/revisions"}],"predecessor-version":[{"id":74379,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/posts\/74375\/revisions\/74379"}],"wp:attachment":[{"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/media?parent=74375"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/categories?post=74375"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/tags?post=74375"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}