Dr. David Reich from Harvard Medical School and his colleagues have produced a world map of Denisovan and Neanderthal ancestry in 120 diverse populations. Their analysis proposes that Denisovan admixture into humans occurred about 100 generations after Neanderthal admixture. Dr. Reich and co-authors collected their data by comparing known Neanderthal and Denisovan gene sequences across more than 250 genomes from…
In a new evolutionary proof of the old adage, ‘we are what we eat’, Cornell University scientists have found tantalizing evidence that a vegetarian diet has led to a mutation that — if they stray from a balanced omega-6 to omega-3 diet — may make people more susceptible to inflammation, and by association, increased risk of heart disease and colon…
About eight percent of our DNA is viral in origin: remnants of ancient battles between infectious viruses and our ancestors. These so-called endogenous viruses are often perceived as a mere oddity with no clear biological significance. But a new study by scientists at the University of Utah School of Medicine shows that evolution has repurposed some of these viral remains into weapons…
New findings from Blombos Cave show that Stone Age man in Africa exchanged technology to a large extent. The more contact between groups, the stronger technology developed. The exchange of tools can explain humans journey from Africa to Europe. “The pattern we are seeing is that when demographics change, people interact more. For example, we have found similar patterns engraved on…
The Y chromosome is a symbol of maleness, present only in males and encoding genes important for male reproduction. But a new study has shown that live mouse progeny can be generated with assisted reproduction using germ cells from males which do not have any Y chromosome genes. This discovery adds a new light to discussions on Y chromosome gene…
A team of geneticists from Trinity College Dublin and archaeologists from Queen’s University Belfast has sequenced the first genomes from ancient Irish humans, and the information buried within is already answering pivotal questions about the origins of Ireland’s people and their culture. The team sequenced the genome of an early farmer woman, who lived near Belfast some 5,200 years ago,…