Nell Greenfieldboyce appears in the following:
Thursday, April 17, 2014
Kepler-186f is almost the same size as Earth, and it orbits in its star's "Goldilocks zone"-- where temperatures may be just right for life. But much is unknown because it's also 500 light-years away.
Sunday, April 13, 2014
Greenhouse gas emissions will have to drop 40 to 70 percent by 2050 — and then drop even more, to nearly zero by the end of this century — a new U.N. report says.
Thursday, April 10, 2014
Researchers ignited a debate three years ago when they changed a deadly flu virus so that it could spread between people. Only five mutations are needed to turn the virus into a pandemic threat.
Thursday, April 03, 2014
Curators say they'll use the big grant from Boeing to better highlight how exploratory flight — from the Spirit of St. Louis to the Starship Enterprise — has transformed the world.
Wednesday, April 02, 2014
Risks to astronauts on extended missions include vision impairment, weakened bones and radiation exposure. There are also psychological risks from facing danger while being stuck inside a small craft.
Wednesday, March 26, 2014
The tiny world is a pink-hued ball of ice in an area of space once thought to be relatively empty. But the new findings hint of other small objects — and perhaps an unseen planet bigger than Earth.
Thursday, March 20, 2014
The great spotted cuckoo is a parasitic bird that plops its eggs in nests of other birds, so others can care for its chicks. Those chicks might aid the caretaker bird by helping to repel predators.
Tuesday, March 18, 2014
In the 1980s, NASA engineer Robert Farquhar came up with a sly plan to divert the ISEE-3 satellite from its original path to visit a comet instead. Now Farquhar has another big plan for his "baby."
Monday, February 24, 2014
Zircon crystals found in sandstone on an Australian sheep ranch are so tiny that you'd need a magnifying glass to see them. But recent measurements confirm they offer our earliest glimpse of Earth.
Tuesday, February 04, 2014
Ten pharmaceutical companies have agreed to cooperate with the National Institutes of Health in the hunt for new medicines to treat Alzheimer's disease, Type 2 diabetes, rheumatoid arthritis and lupus. All the scientific data produced by the venture will be shared publicly.
Wednesday, December 04, 2013
The Department of Interior's Bureau of Ocean Energy Management admits no liability in the whistle-blower case brought by the scientist. The agency says it agreed to the settlement to avoid litigation costs.
Friday, November 15, 2013
Day after day, workers at Michigan State University care for and feed colonies of evolving bacteria. The original microbes have produced more than 50,000 generations in the 25 years since the experiment began. Despite predictions the bacteria might someday reach a point where they would evolve no more, the results show they keep changing.
Tuesday, November 05, 2013
About 22 percent of sun-like stars in our galaxy may have planets orbiting them that are about the size of Earth and bathed in similar amounts of sunlight, according to a new analysis of data from the Kepler Space Telescope.
Friday, November 01, 2013
Is that a left wag or a right wag? Scientists have previously shown that dogs tend to wag their tails to their right side when they see something friendly, like their owners. But a new study shows that other dogs can actually pick up on these emotional cues.
Friday, March 29, 2013
The sand is pumped underground along with water and other chemicals to extract oil and natural gas trapped deep in rock. But researchers found that air samples taken at some drilling sites contained high enough levels of very fine silica particles to be dangerous to workers.
Wednesday, March 13, 2013
NASA's newest rover on Mars has just finished analyzing a sample of powder drilled from inside a rock, and has found evidence that the red planet once had conditions that could have supported microbial life.
Friday, December 07, 2012
It's been 40 years since NASA launched Apollo 17, its final human mission to the moon. The commander of that mission says he'd love to give up his claim to fame as "the last man on the moon" but concedes that it probably won't happen in his lifetime. And future trips might be run by companies in the private sector.
Thursday, November 22, 2012
Candied yams with a touch of marshmallow cream are what the astronauts on the International Space Station are looking forward to eating for their Thanksgiving feast today. That and a little irradiated smoked turkey, courtesy of NASA.
Friday, September 28, 2012
Charles Monnett's 2006 report on drowning polar bears became a rallying cry for environmentalists. Then he was accused of scientific misconduct. On Friday, he learned he had been cleared.
Friday, September 28, 2012
NASA's newest Mars rover snapped photos of rocky outcroppings that jut out from the alien soil. Scientists say they look like the remnants of an ancient stream bed where water once flowed on the surface of the red planet.