Nell Greenfieldboyce Nell Greenfieldboyce is a NPR science correspondent.
Nell Greenfieldboyce 2010
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Nell Greenfieldboyce

Encore: Scientists Discover Centuries-Long Lifespan Of Greenland Shark

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This rock was found on a British beach. Some scientists believe it could contain fossilized brain tissue. Jamie Hiscocks/University of Cambridge hide caption

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Jamie Hiscocks/University of Cambridge

Researchers Say They've Found A Bit Of Fossilized Dinosaur Brain

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Corot 7b L. Calçada/ESO hide caption

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L. Calçada/ESO

Out Of This World: How Artists Imagine Planets Yet Unseen

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The Danaher ELECTronic 1242 voting machine, on display in 2004 at the Franklin County Board of Elections office in Columbus, Ohio. The machines have been in use in the state since 1992. David S. Holloway/Getty Images hide caption

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David S. Holloway/Getty Images

Why Worries About Paperless Voting Loom Larger This Year

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Obama Declares Humans Should Go To Mars By The 2030s

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An illustration of Rosetta just before Friday's expected landing on the comet known as 67P/Churyumov-Gerasimenko. The final approach aims to be only at "walking speed," mission specialists say, but that's enough to tip the antenna away from Earth. ATG medialab/ESA hide caption

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ATG medialab/ESA

Scientists To Bid A Bittersweet Farewell To Rosetta, The Comet Chaser

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This rendering shows a snapshot from a cosmological simulation of a Lyman-alpha blob. J.Geach/D.Narayanan/R.Crain/European Southern Observatory hide caption

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J.Geach/D.Narayanan/R.Crain/European Southern Observatory

Astronomers Find Clues In The Case Of The Glowing Space 'Blobs'

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Under NASA's plan, a spacecraft would get to the asteroid in the early 2020s — then pluck a car-sized boulder from the surface and head back toward Earth, to put the boulder in orbit around the moon. NASA hide caption

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NASA

NASA's Other Asteroid Mission: Grab A Chunk And Put It In Orbit Around The Moon

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The spiny lizard, like other lizards, relies on sunshine and shade to regulate its body temperature. That makes the animals particularly vulnerable to climate change. Michael Angilletta, Arizona State University, Michael Sears, Clemson University hide caption

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Michael Angilletta, Arizona State University, Michael Sears, Clemson University

What did she say? Eniko Kubinyi/Science hide caption

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Eniko Kubinyi/Science

Their Masters' Voices: Dogs Understand Tone And Meaning Of Words

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An artist's depiction of the surface of the planet Proxima b as it orbits the red dwarf star Proxima Centauri, the closest star to our solar system. The planet is a bit more massive than Earth, scientists say, and circles its star once every 11 days. ESO/M. Kornmesser/Nature hide caption

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ESO/M. Kornmesser/Nature

This Planet Just Outside Our Solar System Is 'Potentially Habitable'

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Michigan Wolverines fans do the wave in support of their team as it faces the Brigham Young Cougars at Michigan Stadium on Sept. 26, 2015, in Ann Arbor, Mich. Doug Pensinger/Getty Images hide caption

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Doug Pensinger/Getty Images

The Physics And Psychology Of 'The Wave' At Sporting Events

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