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SETI Talks: The Origin of Water on Earth: Alien Meteors, Icy Comets, or Solar Wind? - Livestream

Water is necessary for life on Earth, but its origin is still unknown. There are multiple hypotheses about its origin. The most common theory is Earth’s water is alien, crashing down in meteors long ago when Earth was very young. Over the eons, icy asteroids and comets delivered oceans to Earth, depositing the water directly to its surface. Another scenario suggests that most of Earth’s water was already inside the planet and rose to the surface over time. Water’s origin may be more complex, brought to us by the solar wind, for instance.

Two experts in the field, Luke Daly and Ashley King, will discuss their recent research on this topic, moderated by Beth Johnson. Luke Daly is a lecturer at the University of Glasgow’s School of Geographical and Earth Sciences, who has studied the solar wind contributions to Earth’s oceans. Ashley King is a Research Fellow at the Natural History Museum in London, whose recent study of a rare space rock known as the Winchcombe meteorite suggested that this type of asteroid is the primary source of water on Earth.

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Wednesday, 03/22/23


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SETI Institute

, CA