Joe Palca Joe Palca is a science correspondent for NPR.
Joe Palca 2010
Stories By

Joe Palca

California Observatory Discovers Two Large Planets Orbiting Nearby Star

  • Download
  • <iframe src="https://www.npr.org/player/embed/403094788/403094789" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

An artist's rendition of the HD 7924 planetary system — just 54 light-years away from Earth — shows newly discovered exoplanets c and d, which join Planet b. Karen Termaura, BJ Fulton/UH IfA hide caption

toggle caption
Karen Termaura, BJ Fulton/UH IfA

Welcome To The Neighborhood: 2 Super-Earths Discovered

  • Download
  • <iframe src="https://www.npr.org/player/embed/403066358/403253070" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">

The Hooker 100-inch reflecting telescope at the Mount Wilson Observatory, just outside Los Angeles. Edwin Hubble's chair, on an elevating platform, is visible at left. A view from this scope first told Hubble our galaxy isn't the only one. Courtesy of The Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, Calif. hide caption

toggle caption
Courtesy of The Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, Calif.

Hubble's Other Telescope And The Day It Rocked Our World

  • Download
  • <iframe src="https://www.npr.org/player/embed/401843663/402160078" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

3-D Printers Are Changing The Way People Think About Manufacturing

  • Download
  • <iframe src="https://www.npr.org/player/embed/401167175/401167178" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Blaze Bioscience is commercially developing the "paint," which glows when exposed to near-infrared light. Courtesy of Blaze Bioscience hide caption

toggle caption
Courtesy of Blaze Bioscience

Doctors Test Tumor Paint In People

  • Download
  • <iframe src="https://www.npr.org/player/embed/397364328/398224695" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Smart phones contain a silicon chip inside the camera that might be used to detect rare, high energy particles from outer space. J. Yang/Courtesy of WIPAC hide caption

toggle caption
J. Yang/Courtesy of WIPAC

Want To Do A Little Astrophysics? This App Detects Cosmic Rays

  • Download
  • <iframe src="https://www.npr.org/player/embed/395800694/396405106" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Safe and small: The credit-card-sized test for anthrax destroys the deadly bacteria after the test completes. Courtesy of Sandia Nation hide caption

toggle caption
Courtesy of Sandia Nation

Safer Anthrax Test Aims To Keep The Bioweapon From Terrorists

  • Download
  • <iframe src="https://www.npr.org/player/embed/395238617/395238618" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Fossil Collection Calls Berkeley's Clock Tower Home

  • Download
  • <iframe src="https://www.npr.org/player/embed/394099662/394099663" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Speeding Up Yeast's Evolution And What It Says About Cancer

  • Download
  • <iframe src="https://www.npr.org/player/embed/391795441/391795442" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Robert Davies (standing) and the quartet during a performance of "The Crossroads Project." Musicians include (left to right) Robert Waters, Rebecca McFaul, Anne Francis Bayless and Bradley Ottesen. Andrew McCallister /Courtesy of The Crossroads Project hide caption

toggle caption
Andrew McCallister /Courtesy of The Crossroads Project

Climate Scientist Tries Arts To Stir Hearts Regarding Earth's Fate

  • Download
  • <iframe src="https://www.npr.org/player/embed/386064582/386758848" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

NASA says this "blue marble" image is the most detailed true-color image of the entire Earth to date. NASA hide caption

toggle caption
NASA

Satellite Set To Stream Daily Images Of Earth From Space

  • Download
  • <iframe src="https://www.npr.org/player/embed/383618359/384345886" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

On The Ant Highway, There's Never A Backup

  • Download
  • <iframe src="https://www.npr.org/player/embed/381647516/381647517" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Unless there's a serious pileup, ants in traffic tend to bypass a collision and just keep going. A physicist has found a way to model this behavior with a mathematical equation. iStockphoto hide caption

toggle caption
iStockphoto

Why Ants Handle Traffic Better Than You Do

  • Download
  • <iframe src="https://www.npr.org/player/embed/377743242/378289404" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

An artist's rendering of what Dearcmhara shawcrossi probably looked like in dinosaur times. Todd Marshall/University of Edinburgh hide caption

toggle caption
Todd Marshall/University of Edinburgh

Ancient Scottish Sea Reptile Not 'Nessie,' But Just As Cute

  • Download
  • <iframe src="https://www.npr.org/player/embed/376132611/376660087" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Scientists Bring The Sun Down To Earth To Learn How It Works

  • Download
  • <iframe src="https://www.npr.org/player/embed/374033068/374033071" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript