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

Nell Greenfieldboyce

Ultrasound is often used for prenatal screening. It's just one of several prenatal screenings available to pregnant women. iStockphoto hide caption

toggle caption
iStockphoto

DNA Blood Test Gives Women A New Option For Prenatal Screening

  • Download
  • <iframe src="https://www.npr.org/player/embed/368449371/381529361" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

An example of a human precision grip — grasping a first metacarpal from the thumb of a specimen of Australopithecus africanus that's thought to be 2 to 3 million years old. T.L. Kivell & M. Skinner hide caption

toggle caption
T.L. Kivell & M. Skinner

Maybe Early Humans Weren't The First To Get A Good Grip

  • Download
  • <iframe src="https://www.npr.org/player/embed/378915363/379157264" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Bar-headed geese tend to follow the sharp ups and downs of the Himalayas as they migrate, research finds. John Downer/Nature Picture Library/Corbis hide caption

toggle caption
John Downer/Nature Picture Library/Corbis

Highflying Geese Save Energy By Swooping Like A Roller Coaster

  • Download
  • <iframe src="https://www.npr.org/player/embed/377321027/377635635" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

How would you sound in front of an NPR microphone? Meredith Rizzo/NPR hide caption

toggle caption
Meredith Rizzo/NPR

How A Position Of Power Can Change Your Voice

  • Download
  • <iframe src="https://www.npr.org/player/embed/371964053/375201488" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Flu Vaccines Still Helpful Even When The Strain Is Different

  • Download
  • <iframe src="https://www.npr.org/player/embed/374621858/374621859" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

The newly described L. larvaepartus (male, left, and female) from Indonesia's island of Sulawesi. Odd, sure, but at least they don't use their stomachs as breeding chambers, as some other frogs do. Jim McGuire/UC Berkeley hide caption

toggle caption
Jim McGuire/UC Berkeley

These Froggies Went A Courtin' And Gave Birth To Live Tadpoles

  • Download
  • <iframe src="https://www.npr.org/player/embed/374244148/374417532" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Farming helped fuel the rise of civilizations, but it may also have given us less robust bones. Leemage/UIG via Getty Images hide caption

toggle caption
Leemage/UIG via Getty Images

When Humans Quit Hunting And Gathering, Their Bones Got Wimpy

  • Download
  • <iframe src="https://www.npr.org/player/embed/372441550/372623618" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

An inside view of this fossil Pseudodon shell shows that the hole made by Homo erectus is exactly at the spot where the muscle attached to the shell. Poking at that spot would force the shell open. Henk Caspers/Naturalis Leiden/The Netherlands hide caption

toggle caption
Henk Caspers/Naturalis Leiden/The Netherlands

Earliest Human Engraving Or Trash From An Ancient Lunch?

  • Download
  • <iframe src="https://www.npr.org/player/embed/367845103/368282969" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Scientists Analyze Skeletal Remains From Vampire Graveyard

  • Download
  • <iframe src="https://www.npr.org/player/embed/366956628/366956629" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Shrinking Sea Ice Could Put Polar Bears In Grave Peril By 2100

  • Download
  • <iframe src="https://www.npr.org/player/embed/366851836/366851837" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Controversy Over Scientist's Shirt Mars Celebration Of Comet Landing

  • Download
  • <iframe src="https://www.npr.org/player/embed/364138333/364138334" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

This is a re-creation of a color plate from Interaction of Color, by Josef Albers. The two X's are are exactly the same — it's the different backgrounds that make them look like very different colors. Source: Josef Albers Interaction of Color hide caption

toggle caption
Source: Josef Albers Interaction of Color

These X's Are The Same Shade, So What Does That Say About Color?

  • Download
  • <iframe src="https://www.npr.org/player/embed/361219912/363101496" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript