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Fast Radio Burst Mystery Deepens: Challenging Existing Theories

2025-01-28

Astronomers using the CHIME telescope and its outriggers precisely pinpointed the origin of fast radio burst FRB 20240209A. Surprisingly, the burst didn't originate from the expected young, star-forming region, but from the outskirts of an 11.3-billion-year-old dead elliptical galaxy. This challenges the current theory that FRBs originate from magnetars. The discovery suggests that the mechanisms behind FRBs are more complex than previously thought, requiring further investigation to unravel their mysteries.

New Study Pinpoints Neanderthal Interbreeding with Modern Humans

2024-12-13

A new analysis of ancient DNA from modern humans in Europe and Asia has precisely determined the timeframe of Neanderthal interbreeding with Homo sapiens. The interbreeding began approximately 50,500 years ago and lasted for about 7,000 years, until Neanderthals began to disappear. This research, using 58 ancient genomes and present-day human genomes, revealed an average interbreeding date of around 47,000 years ago, consistent with archeological evidence. The study also found that East Asians possess about 20% more Neanderthal genes than Europeans and West Asians, potentially due to the presence of mixed genes when modern humans migrated eastward around 47,000 years ago. The findings offer a more complete picture of past human migrations and gene flow, and shed light on the impact of Neanderthal genes on modern human health.