Nell Greenfieldboyce

Nell Greenfieldboyce is a NPR science correspondent.

With reporting focused on general science, NASA, and the intersection between technology and society, Greenfieldboyce has been on the science desk's technology beat since she joined NPR in 2005.

In that time Greenfieldboyce has reported on topics including the narwhals in Greenland, the ending of the space shuttle program, and the reasons why independent truckers don't want electronic tracking in their cabs.

Much of Greenfieldboyce's reporting reflects an interest in discovering how applied science and technology connects with people and culture. She has worked on stories spanning issues such as pet cloning, gene therapy, ballistics, and federal regulation of new technology.

Prior to NPR, Greenfieldboyce spent a decade working in print, mostly magazines including U.S. News & World Report and New Scientist.

A graduate of Johns Hopkins, earning her Bachelor's of Arts degree in social sciences and a Master's of Arts degree in science writing, Greenfieldboyce taught science writing for four years at the university. She was honored for her talents with the Evert Clark/Seth Payne Award for Young Science Journalists.

New genetic tools are making it easier and cheaper to engineer viruses and bacteria, and a report commissioned by the Department of Defense has now ranked the top threats posed by the rapidly advancing field of "synthetic biology."

One of the biggest concerns is the ability to recreate known viruses from scratch in the lab. That means a lab could make a deadly virus that is normally kept under lock and key, such as smallpox.

A huge study on the possible health benefits of drinking alcohol will be completely shut down, because its credibility was compromised by frequent and early interactions between alcohol industry executives, scientists and government officials.

Honeybees understand that "nothing" can be "something" that has numerical meaning, showing that they have a primitive grasp of the concept of zero.

That's according to a newly published study in Science, which shows that bees possess a mathematical ability once thought to exist only in dolphins, primates, birds and humans who are beyond the preschool years.

Suicide rates have increased in nearly every state over the past two decades, and half of the states have seen suicide rates go up more than 30 percent.

Suicide is a major public health issue, accounting for nearly 45,000 deaths in 2016 alone. That is why the Centers for Disease Control and Prevention in Atlanta decided to take a comprehensive look at suicides from 1999 to 2016.

The asteroid impact that ended the age of the dinosaurs also released so much carbon dioxide into the atmosphere that the planet warmed up by about 5 degrees Celsius — and the hot spell persisted for roughly 100,000 years.

That's according to a new study in the journal Science that offers a cautionary tale about how Earth's climate will react to the carbon dioxide that's being pumped into the atmosphere now by the burning of fossil fuels.

Chimps owned by the National Institutes of Health should be moved from research facilities to retirement sanctuaries unless that relocation is "extremely likely" to shorten their lives, a report issued Friday says.

"Chimpanzees should be relocated to the federal sanctuary system unless relocation would place the chimpanzee's life, safety, and welfare at extreme risk," says the report from a working group convened by the NIH to examine the safety of transferring chimps to retirement homes.

Kermit the Frog used to sing that it wasn't easy being green, but that isn't the case for some real-life lizards. They apparently find being green so easy that even their blood is green.

A study published Tuesday suggests seems that this lime-green blood has evolved independently several times in lizards.

Scientists are now trying to understand how these lizards might benefit from blood that's green. The answer could provide new insights into human illnesses like jaundice and malaria.

Ever since astronomers started to detect planets beyond our solar system, they've been trying to find another world just like Earth. And few years ago, they announced that they'd found a planet that was the closest match yet — Kepler-452b.

Trouble is, some astronomers now say it's not possible to know for sure that this planet actually exists.

If signs of life are found on a planet beyond our solar system sometime in the next decade, they'll most likely be on a planet discovered by a NASA satellite that's scheduled to launch on Monday.

The supermassive black hole lurking at the center of our galaxy appears to have a lot of company, according to a new study that suggests the monster is surrounded by about 10,000 other black holes.

For decades, scientists have thought that black holes should sink to the center of galaxies and accumulate there, says Chuck Hailey, an astrophysicist at Columbia University. But scientists had no proof that these exotic objects had actually gathered together in the center of the Milky Way.

Government health agencies have spent more than two decades shying away from gun violence research, but some say the new spending bill, signed by President Trump on Friday, will change that.

That is because, in agency instructions that accompany the bill, there is a sentence noting that the Centers for Disease Control and Prevention has the authority to conduct research on the causes of gun violence.

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AILSA CHANG, HOST:

A Chinese space lab the size of a city bus will soon be falling back to Earth, and no one knows exactly where bits of it might crash down.

Genetic mutations are the driving force of evolution, and now scientists have managed to study the effect of mutations in exquisite detail by watching what happens as they pop up in single cells.

Only about one percent of mutations were bad enough to kill off the cell, according to a report published Thursday in Science. Most of the time, these small changes in its DNA appeared to have no effect at all.

Everyone from NASA to the cast of The Big Bang Theory is reacting Wednesday to the death of acclaimed physicist Stephen Hawking, known for his work on understanding the nature of black holes.

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