Joe Palca

Joe Palca is a science correspondent for NPR. Since joining NPR in 1992, Palca has covered a range of science topics β€” everything from biomedical research to astronomy. He is currently focused on the eponymous series, "Joe's Big Idea." Stories in the series explore the minds and motivations of scientists and inventors.

Palca began his journalism career in television in 1982, working as a health producer for the CBS affiliate in Washington, DC. In 1986, he left television for a seven-year stint as a print journalist, first as the Washington news editor for Nature, and then as a senior correspondent forScience Magazine.

In October 2009, Palca took a six-month leave from NPR to become science writer in residence at the Huntington Library and The Huntington Library, Art Collections, and Botanical Gardens.

Palca has won numerous awards, including the National Academies Communications Award, the Science-in-Society Award of the National Association of Science Writers, the American Chemical Society James T. Grady-James H. Stack Award for Interpreting Chemistry for the Public, the American Association for the Advancement of Science Journalism Prize, and the Victor Cohn Prize for Excellence in Medical Writing.

With Flora Lichtman, Palca is the co-author of Annoying: The Science of What Bugs Us (Wiley, 2011).

He comes to journalism from a science background, having received a Ph.D. in psychology from the University of California at Santa Cruz where he worked on human sleep physiology.


Joe's Big Idea
2:38 pm
Thu September 5, 2013

Coronal Holes: The (Rarely Round) Gaps In The Sun's Atmosphere

NASA's Solar Dynamics Observatory captured this picture of the sun on June 18. The dark blue area in the upper left quadrant of the sun is a huge coronal hole more than 400,000 miles across. Coronal holes are areas of the sun's outermost atmospheric layer β€” the corona β€” where the magnetic field opens up and solar material quickly flows out.

Originally published on Tue September 10, 2013 4:21 pm

There's a hole in the sun's corona. But don't worry β€” that happens from time to time.

"A coronal hole is just a big, dark blotch that we see on the sun in our images," says Dean Pesnell, project scientist for NASA's Solar Dynamics Observatory. "We can only see them from space, because when we look at them [through] a regular telescope, they don't appear."

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3:31 pm
Wed August 7, 2013

Black Holes One Of Space's Great Paradoxes

Originally published on Wed August 7, 2013 4:48 pm

Late summer tends to be a slow month for news. But at All Things Considered, we put on a two hour program, no matter what. So β€” without a trace of irony β€” one of our science correspondents offered to help fill some holes in the show with a series of stories about holes. In this edition: Black holes.

4:43 pm
Thu July 25, 2013

If You Want A Doughnut Hole, Don't Ask A Mathematician

Originally published on Tue August 27, 2013 10:27 am



From NPR News, this is ALL THINGS CONSIDERED. I'm Robert Siegel.

A program such as ours is timed to the exact second, and occasionally, there are small holes when our mix of news and features doesn't quite fill up our two-hour slot.

So NPR's Joe Palca offered to come to our rescue with some short math and sciencey hole-filling stories, stories about what else - holes.

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Joe's Big Idea
2:01 am
Wed July 17, 2013

All Charged Up: Engineers Create A Battery Made Of Wood

Wood fibers are coated with carbon nanotubes and then packed into small disks of metal. The sodium ions moving around in the wood fibers create an electric current.
Heather Rousseau NPR

Originally published on Wed July 17, 2013 4:08 am

The big idea behind Joe's Big Idea is to report on interesting inventions and inventors. When I saw the headline "An Environmentally Friendly Battery Made From Wood," on a press release recently, I figured it fit the bill, so went to investigate.

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11:30 pm
Sun May 12, 2013

Atop A Hawaiian Mountain, A Constant Sniff For Carbon Dioxide

Researchers use the 120-foot tower atop Mauna Loa in Hawaii to collect air samples and measure the amount of carbon dioxide in the atmosphere. Mauna Kea looms in the distance.
Forrest M. Mims III

Originally published on Tue May 14, 2013 12:22 pm

Climate scientists have a good reason to want to get away from it all. To get an accurate picture of the amount of carbon dioxide in the Earth's atmosphere, you have to find places where the numbers won't be distorted by cities or factories or even lots of vegetation that can have a major local impact on CO2 concentrations.

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Joe's Big Idea
1:59 am
Tue May 7, 2013

Envisioning The Future With Cori Lathan

AnthroTronix Founder and CEO Corinna Lathan, at the company's offices in Silver Spring, Md.
Courtesy of AnthroTronix, Inc.

Originally published on Tue May 7, 2013 10:04 am

Computers were created to be useful tools, but all too often it's still a chore to get technology to do our bidding.

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2:33 pm
Thu April 18, 2013

Kepler Telescope Spots 3 New Planets In The 'Goldilocks Zone'

The small squares superimposed on this image of the Milky Way galaxy show where in the sky the Kepler telescope is hunting for Earth-like planets. Kepler, which launched in 2009, has identified more than 100 planets.

Originally published on Thu April 18, 2013 9:26 pm

Astronomers have found three planets orbiting far-off stars that are close to Earth-sized and in the "habitable zone": a distance from their suns that makes the planets' surfaces neither too hot nor too cold, but just right.

One of the three planets orbits a star with the prosaic name Kepler-69.

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Shots - Health News
2:04 pm
Wed January 2, 2013

Drug Fulfills Promise Of Research Into Cystic Fibrosis Gene

Kalydeco is one of the first drugs that is effective at combating the root causes of a genetic disease.
Vertex Pharmaceuticals Inc.

Originally published on Wed January 2, 2013 6:53 pm

The promise of genetic medicine is beginning to be fulfilled, but it's been a long, hard slog.

Take the story of Kalydeco. It's designed to treat people with a lung disease called cystic fibrosis. While not quite a cure, the drug is extremely effective for some CF patients.

But the success of Kalydeco has been more than two decades in the making.

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2:30 pm
Sun December 2, 2012

Signs Of Life On Mars? Not Exactly

NASA's Mars rover Curiosity cut a wheel scuff mark into a wind-formed ripple at the "Rocknest" site to give researchers a better opportunity to examine the particle-size distribution of the material forming the ripple.

Originally published on Sun December 2, 2012 4:06 pm

The director of NASA's Jet Propulsion Laboratory said last week that preliminary data showed the possibility that the agency's Mars Science Laboratory – the six-wheeled rover that landed on Mars in August β€” had found signs of carbon-containing molecules.

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1:05 pm
Thu November 29, 2012

Space Probe Finds Ice In Mercury's Craters

Researchers say they have identified traces of ice in craters on Mercury, seen here in this Oct. 8, 2008, image from the Messenger spacecraft.

Originally published on Thu November 29, 2012 4:37 pm

Mercury is not the first planet to come to mind if you were searching for ice in the solar system. After all, the surface temperature across most of the planet is hot enough to melt lead.

But at the poles on Mercury it's a different story. Almost no sun reaches the poles, and as a result, temperatures can drop to less than -100 degrees Fahrenheit. Now, three papers in the journal Science suggest there really is ice at the bottom of craters near the poles on Mercury.

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