• Earth's Water Origins, Bennu's Salty Secrets, and Marsquakes Unveiled: S28E19

  • Feb 12 2025
  • Length: 33 mins
  • Podcast

Earth's Water Origins, Bennu's Salty Secrets, and Marsquakes Unveiled: S28E19

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  • SpaceTime Series 28 Episode 19
    The Astronomy, Space and Science News Podcast
    New Insights into Earth's Water, Asteroid Bennu's Composition, and Marsquake Triggers
    In this episode of SpaceTime, we investigate a groundbreaking study that challenges previous beliefs about when water arrived on Earth. New findings suggest that water may have come in during the later stages of Earth’s formation, providing fresh perspectives on the origins of life on our planet. The study highlights the importance of molybdenum isotopes in understanding the timing of water delivery and the conditions necessary for life.
    Searles Lake and Asteroid Bennu
    We also explore the intriguing similarities between Searles Lake in California and the asteroid Bennu, as researchers find that both environments share common water-soluble minerals. The Osiris Rex mission has revealed that Bennu's samples contain evaporite minerals formed under wet conditions, shedding light on the potential for life-sustaining elements in our solar system's past.
    Meteoroid Impacts and Marsquakes
    Additionally, a new study indicates that meteoroid impacts may play a more significant role in triggering marsquakes than previously considered. Analyses from NASA's Mars InSight lander reveal that many seismic events on Mars could be linked to impacts, challenging existing assumptions about the planet's seismic activity.
    00:00 Space Time Series 28 Episode 19 for broadcast on 12 February 2025
    00:49 Water arrival on Earth
    06:30 Searles Lake and asteroid Bennu
    12:15 Meteoroid impacts and Marsquakes
    18:00 Changes in men's height and weight
    22:45 Discovery of ancient bird fossils in Antarctica
    27:00 The best way to boil an egg
    30:15 AI and national security concerns
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    ✍️ Episode References
    NASA
    https://www.nasa.gov
    Geochemistry and Cosmochemistry
    https://www.elsevier.com/journals/geochemistry-and-cosmochemistry
    Nature
    https://www.nature.com
    Geophysical Research Letters
    https://agupubs.onlinelibrary.wiley.com/journal/19448007
    Biology Letters
    https://royalsocietypublishing.org/journal/bl
    Nature Communications
    https://www.nature.com/ncomms/

    Become a supporter of this podcast: https://www.spreaker.com/podcast/spacetime-astronomy-science-news--2458531/support.
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