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

Space News Today

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/

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Episode link: https://play.headliner.app/episode/25544288?utm_source=youtube