Joe Palca Joe Palca is a science correspondent for NPR.
Joe Palca, photographed for NPR, 17 January 2019, in Washington DC.
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Joe Palca

Dola Sun for NPR

Breakthrough Pain Treatment Or Snake Oil? You Decide.

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An artist's depiction of two black holes colliding. NASA hide caption

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NASA

Gravitational Wave Detector In Italy Saw Wave Pass Through Earth In August

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An artist's depiction of Planet Nine. The object is thought to be gaseous, similar to Uranus and Neptune. Hypothetical lightning lights up the night side. Caltech/R. Hurt (IPAC) hide caption

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Caltech/R. Hurt (IPAC)

Astronomers Search For Giant Planet On Outer Edges Of Solar System

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Artist's concept of Cassini diving between Saturn and its innermost ring. NASA/JPL-Caltech hide caption

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NASA/JPL-Caltech

Cassini Plunges To Saturn

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NASA's Cassini probe has orbited Saturn for over a decade. This Friday, scientists will steer it into the gas giant's atmosphere. NASA/JPL-Caltech/Space Science Institute hide caption

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NASA/JPL-Caltech/Space Science Institute

Cassini Spacecraft Prepares For A Fiery Farewell In Saturn's Atmosphere

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Lineman and Electricians train with the APA-5 Atlas Powered Ascender to recover rescue dummy prior to the onset of suspension trauma. Courtesy of Nate Ball/Atlas Devices hide caption

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Courtesy of Nate Ball/Atlas Devices

The Army, The Inventor And The Surprising Uses Of A Batman Machine

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Avi Ofer for NPR

How Moldy Hay And Sick Cows Led To A Lifesaving Drug

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Millions Will See Total Solar Eclipse Sweep Across The U.S.

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Nisian Hughes/Getty Images

New Study Highlights Strong Link Between Basic Research And Inventions

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Erik Nelson Rodriguez for NPR

Syrian Refugee And German Scientist Make An Unlikely Team

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The MD Brush toothbrush forces users to hold it at the optimal angle relative to their gums. Shuyao Chen/NPR hide caption

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Shuyao Chen/NPR

Brush Yourself Off And Try Again: An Invention Story

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Flight engineer Kate Rubins checks out the Bigelow Expandable Activity Module, which is attached to the International Space Station. NASA hide caption

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NASA

After A Year In Space, The Air Hasn't Gone Out Of NASA's Inflated Module

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Mary Anderson's illustration of her 1903 patented "window cleaning device." The United States Patent and Trademark Office hide caption

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The United States Patent and Trademark Office

Alabama Woman Stuck In NYC Traffic In 1902 Invented The Windshield Wiper

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Nedal Said risked everything to rejoin the scientific community. Erik Nelson Rodriguez for NPR hide caption

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Erik Nelson Rodriguez for NPR

Web Comic: A Scientist Runs For His Life And Finds His Dream

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Artist's impression of Jupiter's Great Red Spot heating the upper atmosphere. Karen Teramura with James O'Donoghue and Luke Moore/NASA hide caption

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Karen Teramura with James O'Donoghue and Luke Moore/NASA

NASA Spacecraft Gets Up Close With Jupiter's Great Red Spot

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