Joe Palca

Joe Palca is a science correspondent for NPR. Since joining NPR in 1992, Palca has covered a range of science topics — everything from biomedical research to astronomy. In addition to his science reporting, Palca occasionally fills in as guest host on Talk of the Nation Science Friday.

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 for Science 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.

Palca lives in Washington, D.C, with his wife and two sons.

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The Salt
12:58 pm
Thu October 11, 2012

100 Years Ago, Maillard Taught Us Why Our Food Tastes Better Cooked

A tower of profiteroles like this one, known as croquembouche, was created in France to celebrate Maillard, the man credited with identifying a key reaction in food science.
Gavin Tapp via Flickr

Originally published on Thu October 11, 2012 2:36 pm

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Shots - Health Blog
3:17 am
Wed October 10, 2012

Fun With Physics: How To Make Tiny Medicine Nanoballs

Álvaro Marín

Originally published on Thu October 11, 2012 9:20 am

For the past decade, scientists have been toying with the notion of encapsulating medicine in microscopic balls.

These so-called nanospheres could travel inside the body to hard-to-reach places, like the brain or the inside of a tumor. One problem researchers face is how to build these nanospheres, because you'd have to make them out of even smaller nanoparticles.

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Shots - Health Blog
2:22 pm
Tue September 25, 2012

Korean Eunuchs Lived Long And Prospered

A mural in an ancient tomb in China shows a troupe of eunuchs. How long did they live?
Wikimedia Commons

Tell people you're doing a story about the life spans of Korean eunuchs, the typical reaction is a giggle or a cringe.

But if you can overcome your visceral response to the topic, a study scientists in Korea did is quite interesting, both for what they found, and the way they found it.

Several scientists have shown that there is a link between longevity and reproduction: the greater the fertility, the shorter the life span. This has been fairly well established in nonhuman animal species, but proving it's the case for humans has been tricky.

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Shots - Health Blog
3:25 pm
Thu September 20, 2012

Could Genes For Stripes Help Kitty Fight Disease?

The genetic factors responsible for a cat's stripes might help researchers understand disease resistance in humans.
kennymatic via Flickr

Originally published on Thu September 20, 2012 6:04 pm

At this point it's just an interesting hypothesis, but it's possible that understanding cat coloration could help scientists understand resistance to infectious diseases.

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Shots - Health Blog
6:33 pm
Mon September 10, 2012

Vaccine For Dengue Fever Shows A Glimmer Of Hope

A health worker in the Domincan Republic sprays insecticide between houses to stop dengue fever outbreaks this month.
Erika Santelices AFP/Getty Images

It's human nature to hope for positive results after spending months or even years conducting a research study. In well-designed studies, however, scientists identify in advance the criteria for success, so their optimism won't color their conclusions when the study is completed.

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Animals
3:52 am
Thu September 6, 2012

Who's Your Daddy?: Male Snail Carries Eggs As Cargo

A male Solenosteira macrospira, left, carries snail eggs on its shell. But not all of the eggs were fertilized by him. Females, like the one on the right, deposit the eggs into papery capsules and attach them to the males' shells.
P.B. Marko Ecology Letters

Originally published on Fri September 7, 2012 5:28 am

A man is not a mollusk, and many men probably think that's a good thing. And it's not just because a mollusk is a squishy invertebrate with a shell. It's also because for at least one species of mollusk, the males do all the heavy lifting when it comes to childcare.

The species of mollusk we're talking about is Solenosteira macrospira, a marine snail about 2 inches long. These snails live off the coast of Baja California, and during the mating season, the beach is awash with male and female snails in connubial bliss.

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Humans
2:51 pm
Thu August 30, 2012

Pinky DNA Points To Clues About Ancient Humans

A replica of the pinky bone fragment found in a Siberian cave. Researchers used the bone bit to extract and sequence the genome of a girl who lived tens of thousands of years ago.
Max Planck Institute for Evolutionary Anthropology

Originally published on Thu August 30, 2012 6:09 pm

Scientists in Germany have been able to get enough DNA from a fossilized pinky to produce a high-quality DNA sequence of the pinky's owner.

"It's a really amazing-quality genome," says David Reich of Harvard Medical School in Boston. "It's as good as modern human genome sequences, from a lot of ways of measuring it."

The pinky belonged to a girl who lived tens of thousands of years ago. Scientists aren't sure about the exact age. She is a member of an extinct group of humans called Denisovans. The name comes from Denisova cave in Siberia, where the pinky was found.

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Joe's Big Idea
3:23 am
Thu August 23, 2012

Telescope Innovator Shines His Genius On New Fields

Roger Angel, an astronomer at the University of Arizona, stands in front of his new project: a solar tracker. Angel wants to use the device to harness Arizona's abundant sunlight and turn it into usable energy.
Jason Millstein for NPR

Originally published on Thu August 23, 2012 12:23 pm

You may not be familiar with the name Roger Angel, but if there were ever a scientist with a creative streak a mile wide, it would be he.

Angel is an astronomer. He's famous for developing an entirely new way of making really large, incredibly precise telescope mirrors. But his creativity doesn't stop there. He's now turned his attention to solar power, hoping to use the tricks he learned from capturing distant light from stars to do a more cost-efficient job of capturing light from the Sun.

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Joe's Big Idea
3:31 am
Mon August 13, 2012

Summer Science: What's A Meteor Shower?

In this photo released by SkyandTelescope.com, a Perseid meteor flashes across the constellation Andromeda on Aug. 12, 1997.
Rick Scott and Joe Orman AP

Originally published on Mon August 13, 2012 4:23 am

NPR science correspondent Joe Palca is on a mission this summer to answer the deep, burning questions of summertime. So far he's taught us how to build a campfire, explained the best way to roast a perfect marshmallow and explored the icy mystery of brain freeze.

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Joe's Big Idea
3:00 am
Fri August 10, 2012

So You Landed On Mars. Now What?

Adam Steltzner, the leader of the rover's entry, descent and landing engineering team, cheers after Curiosity touched down safely on Mars on Sunday.
Bill Ingalls/NASA Getty Images

Originally published on Fri August 10, 2012 6:28 am

The Mars rover Curiosity is beginning its fifth day on the red planet, and it's been performing flawlessly from the moment it landed.

That's been especially gratifying for NASA landing engineer Adam Steltzner. Last Friday, while Steltzner was still on pins and needles waiting for the landing to take place, I told the story of Steltzner's decision as a young man to give up his life as a rocker and go for a career in space engineering.

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