ScienceDaily
DNA research just rewrote the origin of human species
Modern humans did not descend from a single ancestral African population, according to a landmark genetic study. By analyzing DNA from diverse African groups, including the genetically distinct Nama people, researchers found that early humans evolved from multiple intermingling populations over hundreds of thousands of years. The findings replace the clean "single origin" model with a far messier, more interconnected picture of how our species came to be.
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Deep under Antarctic ice, a long-predicted cosmic whisper finally breaks through in 13 strange bursts
A detector buried beneath Antarctic ice has recorded the first direct evidence of radio pulses produced when high-energy cosmic rays collide with the ice and trigger particle cascades — a phenomenon theorized for decades but never experimentally confirmed. The Askaryan Radio Array Collaboration published the findings in Physical Review Letters, identifying 13 distinct bursts that validate a detection technique long considered promising. The breakthrough lays critical groundwork for eventually capturing some of the universe's rarest and most energetic particles, opening a new window into extreme cosmic events.
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Blood vessels found in T. rex bones are rewriting dinosaur science
Researchers have discovered remarkably preserved blood vessels inside the fossilized rib of Scotty, one of the largest T. rex specimens ever found, dating back 66 million years. The vessels, rich in iron and hidden within a once-fractured bone, were revealed using synchrotron X-ray technology that allowed scientists to examine the fossil without cutting into it. The find challenges long-held assumptions about soft tissue preservation and opens new avenues for understanding dinosaur biology at a cellular level.
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This new tool makes AI's role in student writing visible
AI use in student writing has reached near-universal levels, with 90% of college students incorporating it into coursework and nearly half using it during drafting itself. A new tool aims to shift the conversation from whether students are using AI to how, giving professors meaningful insight into the role AI plays in the writing process. Traditional detection platforms like Turnitin are proving inadequate for this more nuanced challenge.
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