Nell Greenfieldboyce

Nell Greenfieldboyce appears in the following:

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.


Encore: Babies and toddlers know that swapping saliva is a sure sign of love

Friday, April 15, 2022

A study suggests babies are aware that people who are willing to share saliva, through kissing or sharing spoons, have especially close relationships. (Story aired on ATC on Jan. 20, 2022.)


Fossil footprints mistakenly attributed to bears were made by early humans

Tuesday, April 12, 2022

A new look at some fossilized footprints shows that more than one species of human was walking upright around 3.6 million years ago. (This story originally aired on ATC on Dec. 2, 2021.)


A worrisome new bird flu is spreading in American birds and may be here to stay

Saturday, April 09, 2022

Scientists are tracking a deadly bird flu outbreak that has infected wild birds in more than 30 states. Purging the nation's poultry supply may not be enough to keep the virus from sticking around.


The light from this star that astronomers just spotted is 12.9 billion years old

Wednesday, March 30, 2022

Scientists using the Hubble Space Telescope have spotted light from what appears to be the most distant star ever seen. It offers a glimpse into an early moment in the history of the universe.


This trick keeps snakes from suffocating as they squeeze and swallow their prey

Thursday, March 24, 2022

How do boa constrictors breathe while constricting their victims? A new study finds that snakes can switch which set of ribs they use to draw in air as they crush their meal before devouring it.


Astronomy's contribution to climate change rivals the emissions from some countries

Monday, March 21, 2022

Building and operating telescopes can generate a lot of greenhouse gases. In fact, it's as if each astronomer in the world was driving more than 100,000 miles per year, a new study finds.


The James Webb Space Telescope is working as well as astronomers dreamed it would

Wednesday, March 16, 2022

Picture perfect: Mission managers say the telescope's mirror segments have been aligned and have focused on single stars, a critical milestone, and the telescope is working flawlessly.