genetics

2 million-year-old teeth reveal secrets from the dawn of humanity

jaw tooth protein fossil genetics

For decades, Paranthropus robustus has intrigued scientists as a powerful, big-jawed cousin of early humans. Now, thanks to ancient protein analysis, researchers have cracked open new secrets hidden in 2-million-year-old tooth enamel. These proteins revealed both sex and subtle genetic differences among fossils, suggesting Paranthropus might not have been one species but a more complex evolutionary mix.

01/11/2025 sciencedaily-human-evo

From poison to power: How lead exposure helped shape human intelligence

tooth genetics

Long before humans built cities or wrote words, our ancestors may have faced a hidden threat that shaped who we became. Scientists studying ancient teeth found that early humans, great apes, and even Neanderthals were exposed to lead millions of years ago. This toxic metal can damage the brain, yet modern humans developed a tiny genetic change that protected our minds and allowed language and intelligence to flourish.

16/10/2025 sciencedaily-human-evo

Who are the Papua New Guineans? New DNA study reveals stunning origins

DNA migration Guinea Papua New Guinea genetics study

On remote islands of Papua New Guinea, people carry a story that ties us all back to our deepest roots. Although their striking appearance once puzzled scientists, new genetic evidence shows they share a common ancestry with other Asians, shaped by isolation, adaptation, and even interbreeding with mysterious Denisovans. Yet, their unique history — marked by survival bottlenecks and separation from farming-driven booms — leaves open questions about the earliest migrations out of Africa and wheth

15/09/2025 sciencedaily-human-evo

The hidden Denisovan gene that helped humans conquer a new world

genetics study

Ancient humans crossing the Bering Strait into the Americas carried more than tools and determination—they also carried a genetic legacy from Denisovans, an extinct human relative. A new study reveals that a mysterious gene called MUC19, inherited through interbreeding between Denisovans, Neanderthals, and humans, may have played a vital role in helping early Americans survive new diseases, foods, and environments.

24/08/2025 sciencedaily-human-evo

The hidden Denisovan gene still protecting humans today

DNA migration genetics

Scientists have discovered that a gene called MUC19, inherited from Denisovans through ancient interbreeding, may have played a vital role in helping Indigenous ancestors adapt as they migrated into the Americas. Found at unusually high frequencies in both modern and ancient populations, the gene likely provided immune advantages against new pathogens. This research highlights how archaic DNA, passed through both Denisovans and Neanderthals, enriched human genetic diversity in ways that still sh

24/08/2025 sciencedaily-human-evo