TSU Foundation

09/05/2026

09/05/2026

Experts found Asian DNA from an unknown population in Native Americans.

A newly discovered "ghost" population in the DNA of Indigenous Americans is rewriting the history of migration across the continent.

Modern DNA technology has uncovered a hidden chapter in the history of the Americas, revealing a "ghost" population that left its mark on Indigenous ancestry roughly 1,300 years ago. By sequencing the genomes of nearly 200 individuals, including members of Andean communities like the Quechua, researchers identified a distinct genetic signal that does not match any known ancient group.

This discovery suggests that a previously undocumented wave of people arrived from Asia and integrated into existing South American societies, rather than replacing them. Because no physical remains of this specific group have been found, their existence is known solely through the persistent genetic legacy they left behind in modern populations.

This finding challenges the long-held "first-in" model of American migration, which traditionally focused on a limited number of early waves crossing from Asia into North America. Instead, the evidence points to a much more dynamic and continuous "web" of human movement that lasted for millennia. These later interactions and migrations highlight the incredible resilience and complexity of Indigenous history, proving that ancient lineages often blended together in ways that archaeological records alone cannot capture. As genomic science advances, it continues to reveal how lost populations helped shape the diverse genetic landscape of the modern world.

source: Nature. The evolutionary history and unique genetic diversity of Indigenous Americans. Nature.

10/03/2026

10/03/2026

Scientists just confirmed that that long-term cannabis use does NOT increase cognitive decline.

New 44-year study debunks the myth that cannabis causes permanent IQ loss, showing users may actually experience less cognitive decline than non-users.

New research is shattering the long-held myth that cannabis use leads to permanent cognitive decline. A landmark 2024 study tracking over 5,000 Danish men for more than four decades found no evidence that cannabis use accelerates brain aging or drains intelligence. Remarkably, the data revealed that cannabis users actually experienced slightly less IQ decline over the 44-year period than those who never used the drug. These findings suggest that adult cognitive health is far more resilient than previously assumed, while separate research even indicates that low-dose THC may help reverse signs of brain aging by restoring vital neural connections.

However, medical experts caution that while IQ scores may remain stable, high-potency and heavy use carry significant biological trade-offs. Frequent consumption has been linked to DNA alterations affecting immune function and energy production, alongside physical risks like cannabinoid hyperemesis syndrome. Mental health also remains a critical factor, as high-potency products can increase the risk of paranoia, anxiety, and psychosis in susceptible individuals. The takeaway is clear: while cannabis may not make you permanently "stupid," the frequency and intensity of use remain the primary drivers of its overall impact on your health and well-being.

source: Høeg, K. M., Frodegaard, R. L., Grønkjær, M., Osler, M., Mortensen, E. L., Flensborg-Madsen, T., & Okholm, G. T. Cannabis use and age-related changes in cognitive function from early adulthood to late midlife in 5162 Danish men. Brain and Behavior.