Nell Greenfieldboyce

Nell Greenfieldboyce appears in the following:

After two failed attempts to launch, NASA's moon rocket may need repairs

Sunday, September 04, 2022

For a second time, NASA has scrubbed the launch of its new moon rocket. Problems with fuel leaks and faulty sensors led to the delays for the Artemis-1 test mission, with more possible delays to come.


NASA won't try to launch the Artemis 1 moon mission again for at least a few weeks

Saturday, September 03, 2022

A recurring leak of liquid hydrogen fuel forced NASA on Saturday to postpone a scheduled launch for the second time this week. The earliest possible launch date is Sept. 19.


NASA delays Artemis I test flight because of engine issues

Monday, August 29, 2022

NASA scrubbed its Artemis I test flight to the moon due to engine issues but will try again Friday. The flight is uncrewed but NASA hopes to send people back to the moon on future flights.


NASA'S pricey new moon rocket — is it worth the cost?

Sunday, August 28, 2022

NASA plans to test launch its newest rocket — one it hopes will eventually take astronauts back to the moon. But the rocket's big price tag has some critics skeptical about its future.


NASA begins countdown for its mission around the moon

Sunday, August 28, 2022

Monday, NASA plans to launch a new rocket and capsule to the moon. If all goes well, the next mission will send people back to lunar orbit for the first time in 50 years.


NASA plans to launch a huge moon rocket but the price tag may impede its future

Friday, August 26, 2022

NASA plans to test launch its newest rocket next week — one it hopes will eventually take astronauts back to the moon. But the rocket's big price tag has some critics skeptical about its future.


What happens to sweat in outer space (Hint: There's no gravity to help it drip away)

Monday, August 22, 2022

Humans' ability to sweat is useful on Earth — but when people go up into space, they find that perspiring in zero gravity presents some unique challenges.


Why scientists have pumped a potent greenhouse gas into streams on public lands

Monday, August 15, 2022

A 30-year, nationwide study of ecological changes — including the effects of climate warming — has been releasing a powerful greenhouse gas, and critics want it to stop.


The new science coming from the James Webb telescope has astronomers giddy

Thursday, July 21, 2022

In the week since the first images from the James Webb Space Telescope were unveiled, astronomers have been poring through all the observations it's made so far--and they're happily overwhelmed.


The James Webb Space Telescope images have been a game changer for astronomers

Wednesday, July 20, 2022

In the week since the first James Webb Space Telescope images were unveiled, astronomers have been poring over all its observations so far. What they've seen has them giddy.


Think all bacteria are microscopic? Tell that to these centimeter-long monsters

Thursday, June 23, 2022

The largest bacteria known to science have been discovered in the Caribbean. They're visible to the naked eye and surprisingly complex.


In a place with little sea ice, polar bears have found another way to hunt

Thursday, June 16, 2022

An isolated population of polar bears in southeast Greenland has learned to hunt on freshwater glacier ice. That means they may be able to survive longer as climate change makes sea ice scarce.


Research shows policies that may help prevent mass shootings — and some that don't

Thursday, May 26, 2022

The amount of resources devoted to studying gun violence is paltry compared to its public health impact. Still the evidence shows certain policies might help prevent mass shootings.


The black hole in the center of the Milky Way galaxy is captured in an image

Friday, May 13, 2022

An image of what looks like a glowing orange donut is actually the first picture of the supermassive black hole at the center of the Milky Way, our home galaxy.


The 1st image of the supermassive black hole at our galactic center

Thursday, May 12, 2022

The first ever image of the black hole at the center of our galaxy has been released by scientists, who say it shows Albert Einstein was right about gravity.


CDC says firearm-related homicides skyrocketed amid stresses of the pandemic

Wednesday, May 11, 2022

The CDC reports a historic increase in firearm deaths. During the pandemic, there has been a 35% increase in the firearm homicide rate, and suicides by firearm also are persistently high.


Firearm-related homicide rate skyrockets amid stresses of the pandemic, the CDC says

Tuesday, May 10, 2022

The rate of U.S. gun homicides jumped nearly 35% in 2020 to the highest level in more than 25 years. And gaps widened for groups already at the highest risk, especially Black men and boys.


NASA is bringing rocks back from Mars, but what if those samples contain alien life?

Wednesday, May 04, 2022

NASA and the European Space Agency are gearing up to bring home a pristine sample of Martian rock. But given the small chance of life on the red planet, they have to grapple with safety questions.


Encore: A new bird flu is spreading in American birds and it may be here to stay

Wednesday, April 20, 2022

Millions of chickens and turkeys have been killed to control an avian flu outbreak, but the virus is also infecting wild birds. (Story first aired on Weekend Saturday on April 9, 2022.)


NASA advisers call for a visit to Uranus, plus more science during moon landings

Tuesday, April 19, 2022

NASA should send probes to the ice giant planet of Uranus and to a moon of Saturn where conditions could be right for life. Those are some of the recommendations in a new report to the space agency.