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Did life start on the ocean floor — and what does that mean for alien life?

Some scientists are searching for the origins of life on Earth by simulating prebiotic conditions at hydrothermal vents, like this "black smoker" in the Pacific Ocean.
Ralph White
/
Getty Images
Some scientists are searching for the origins of life on Earth by simulating prebiotic conditions at hydrothermal vents, like this "black smoker" in the Pacific Ocean.

How did life start on Earth? The answer is a big scientific mystery scientists are actively investigating. After talking with many scientists, host Regina G. Barber found that an abundance of water on Earth is most likely key, in some way, to the origin of life — specifically, in either deep sea hydrothermal vents or in tide pools. It's for this reason some scientists are also exploring the potential for life in so-called "water worlds" elsewhere in the solar system, like some of the moons of Jupiter and Saturn. This episode, Regina digs into two water-related hypotheses for the origin on life on Earth — and what that might mean for possible alien life.

Have another scientific mystery you want us to cover on a future episode? Email us at shortwave@npr.org — we might feature your idea on a future episode!

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This episode was produced by Hannah Chinn. It was edited by Rebecca Ramirez and fact-checked by Tyler Jones. The audio engineer was Robert Rodriguez.

Copyright 2024 NPR

Regina G. Barber
Regina G. Barber is Short Wave's Scientist in Residence. She contributes original reporting on STEM and guest hosts the show.
Emily Kwong (she/her) is the reporter for NPR's daily science podcast, Short Wave. The podcast explores new discoveries, everyday mysteries and the science behind the headlines — all in about 10 minutes, Monday through Friday.
Hannah Chinn