Nell Greenfieldboyce Nell Greenfieldboyce is a NPR science correspondent.

Workers with the aid group Doctors Without Borders prepare a new Ebola treatment center near Monrovia, Liberia, on Sunday. The facility has 120 beds, making it the largest Ebola isolation clinic in history. John Moore/Getty Images hide caption

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John Moore/Getty Images

How Much Bigger Is The Ebola Outbreak Than Official Reports Show?

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Kenyan health officials take the temperatures of passengers arriving at the Nairobi airport on Thursday. Kenya has no reported cases of Ebola, but it's a transportation hub and so is on alert. Simon Maina/AFP/Getty Images hide caption

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Simon Maina/AFP/Getty Images

A Virtual Outbreak Offers Hints Of Ebola's Future

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An outbreak of bird flu in India in 2008 prompted authorities to temporarily ban the sale of poultry. Diptendu Dutta/AFP/Getty Images hide caption

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Diptendu Dutta/AFP/Getty Images

Biologists Choose Sides In Safety Debate Over Lab-Made Pathogens

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Ethics Panel Endorses The Use Of Experimental Drugs To Slow Ebola

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Katherine Streeter for NPR

Big Data Peeps At Your Medical Records To Find Drug Problems

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Early days: NASA's International Sun-Earth Explorer C (also known as ISEE-3 and ICE) was undergoing testing and evaluation inside the Goddard Space Flight Center's dynamic test chamber when this photo was snapped in 1976. NASA hide caption

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NASA

The Little Spacecraft That Couldn't

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With a comet fly-by and a solar orbit behind it, ISEE-3 has now revved its engines for a swing past the moon. Mark Maxwell/Courtesy ISEE-3 Reboot Project hide caption

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Mark Maxwell/Courtesy ISEE-3 Reboot Project

A 6-foot-long electric eel is basically a 6-inch fish attached to a 5-1/2-foot cattle prod, researchers say. The long tail is packed with special cells that pump electricity without shocking the fish. Mark Newman/Getty Images/Lonely Planet Image hide caption

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Mark Newman/Getty Images/Lonely Planet Image

A Shocking Fish Tale Surprises Evolutionary Biologists

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By comparing "Skull 17" from the Sima de los Huesos site with many others found in the same cave, researchers were able to discern the common facial features of the era. Javier Trueba /Madrid Scientific Films hide caption

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Javier Trueba /Madrid Scientific Films

How To Become A Neanderthal: Chew Before Thinking

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DNA from these crab plovers, collected in Djibouti, Africa, should help scientists figure out how the unusual species fits into the family tree, says the Smithsonian's Helen James. Maggie Starbard/NPR hide caption

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Maggie Starbard/NPR

Is Collecting Animals For Science A Noble Mission Or A Threat?

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The egg definitely came before the chicken in this case — the skeleton is from a modern adult kiwi, the egg from its much bigger, long-extinct cousin, Aepyornis maximus. Kyle Davis and Paul Scofield/Canterbury Museum hide caption

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Kyle Davis and Paul Scofield/Canterbury Museum

Big Flightless Birds Come From High-Flying Ancestors

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Unlike humans, an octopus doesn't have constant awareness of each arm's location. Each appendage sort of has a "mind of its own," research shows. Joe Parks/Flickr hide caption

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Joe Parks/Flickr

Why This Octopus Isn't Stuck-Up

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'Past The Point Of No Return:' An Antarctic Ice Sheet's Slow Collapse

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Being able to insert the two man-made letters into DNA, alongside the usual four-letter alphabet, could teach old cells new tricks and lead to better drugs, researchers say. courtesy of Synthorx hide caption

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courtesy of Synthorx

Chemists Expand Nature's Genetic Alphabet

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