audioEARTH, a podcast from the American Geosciences Institute – Greenhouse

audioEARTH, a podcast from the American Geosciences Institute

Listen now to Episode 6: “Greenhouse

The word “greenhouse” brings to mind a few different ideas. Agriculture and growth, for starters. Protection from the cold, perhaps. Glass walls. Glass ceilings. Greenhouse also refers to a fundamental idea in climate science – the greenhouse effect. But did you know that the greenhouse effect was first discovered by a woman? In this episode we’re telling the story of this discovery by geoscientist Eunice Foote, and we’re talking with some of the people and organizations that are promoting women in the geosciences.


Guests are Mackenzie Cremeans, Ph.D. (Association of Women Geoscientists), Professor Collin Roesler, Ph.D. (Bowdoin College), and Heather Houlton (American Geosciences Institute).

This is the final episode of season 1! If you’ve enjoyed listening, please consider leaving a review on iTunes. It helps others find the show. Thanks!

audioEARTH connects Earth, science and people by sharing compelling audio stories about geoscience.

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Geoscientists discover an overlooked source for Earth’s water

“Where did Earth’s global ocean come from? A team of Arizona State University geoscientists led by Peter Buseck, Regents’ Professor in ASU’s School of Earth and Space Exploration (SESE) and School of Molecular Sciences, has found an answer in a previously neglected source. The team has also discovered that our planet contains considerably more hydrogen, a proxy for water, than scientists previously thought.

So where is it? Mostly down in our planet’s core, but more about that in a minute. The bigger question is where did all this come from in the first place.


“Comets contain a lot of ices, and in theory could have supplied some water,” says Steven Desch, professor of astrophysics in SESE and one of the team scientists. Asteroids, he adds, are a source as well, not as water-rich yet still plentiful.

“But there’s another way to think about sources of water in the solar system’s formative days,” Desch explains. “Because water is hydrogen plus oxygen, and oxygen is abundant, any source of hydrogen could have served as the origin of Earth’s water.””

Read more at: https://phys.org/news/2018-11-geoscientists-overlooked-source-earth.html#jCp

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