A new study in Nature Astronomy suggests that millions of years ago, our solar system may have sailed through a dense interstellar cloud, drastically shrinking the heliosphere — the Sun’s protective bubble — and exposing Earth to an influx of cosmic radiation and interstellar dust. Geological evidence, including isotopes like iron-60 and plutonium-244 found in Antarctic snow, deep-ocean sediments, and Moon samples, supports the idea of this cosmic encounter. Scientists believe it could have altered atmospheric chemistry, triggered global cooling, and even influenced human evolution. Join us as we uncover how this ancient journey through space may have left a lasting mark on Earth’s climate.
#space #science #wionpodcast
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