Wolves were native to the Yellowstone National Park until hunting wiped them out. In 1995, when the wolves began to come back, something interesting happened: The rest of the park began to find a new, more healthful balance.
Bernie Krause has been recording the wild — the wind in the trees, the chirping of birds — for 45 years. He has seen many environments radically altered by humans, sometimes even by practices thought to be environmentally safe.
Originally published on Fri September 27, 2013 10:56 am
Declaring that "human influence on the climate system is clear," a U.N.-assembled panel of scientists reported Friday that "it is extremely likely that human influence has been the dominant cause of the observed warming since the mid-20th century."
Originally published on Fri September 27, 2013 6:14 am
Scientists assembled by the United Nations sent out a renewed warning Friday that the planet is warming up and human beings are largely responsible. The Intergovernmental Panel on Climate Change has released a report that projects more warming air, melting ice and rising seas in this century.
During an experiment, marketing professor Remi Trudel noticed a pattern in what his volunteers were recycling versus throwing in the garbage. He then went through his colleagues' trash and recycling bins at Boston University for more data.
He found the same pattern, says NPR's Shankar Vedantam: "Whole sheets of paper typically went in the recycling, but paper fragments went in the trash."
Same type of paper, different shapes, different bins.
Something is wrong in Florida's Indian River Lagoon.
Over the past year, record numbers of dolphins, manatees and pelicans have turned up dead in the 150-mile-long estuary that runs along Florida's Atlantic Coast. Bouts of algal blooms have flourished in the waters. All the signs point to an ecosystem that is seriously out of balance. The crisis has mobilized scientists, residents and elected officials in Florida.
Originally published on Fri September 27, 2013 3:03 pm
From vacant lots to vertical "pinkhouses," urban farmers are scouring cities for spaces to grow food. But their options vary widely from place to place.
While farmers in post-industrial cities like Detroit and Cleveland are claiming unused land for cultivation, in New York and Chicago, land comes at a high premium. That's why farmers there are increasingly eyeing spaces that they might not have to wrestle from developers: rooftops that are already green.
There has been a lot of extreme weather in the Northern Hemisphere this year, including the recent torrential rains in Colorado, flooding in Europe, bitter cold in Florida and a heat wave in Alaska. And scientists say all of it is related to some odd behavior by the powerful air currents called the polar jet stream.
Americans love bananas. Each year, we eat more bananas than any other fruit. But banana growers use a lot of pesticides — and those chemicals could be hurting wildlife. As a new study shows, the pesticides are ending up in the bodies of crocodiles living near banana farms in Costa Rica, where many of the bananas we eat are grown.
Scientists and government representatives are meeting in Stockholm this week to produce the latest high-level review of climate change. It's thousands of pages of material, and if it's done right, it should harbor very few surprises.
That's because it's supposed to compile what scientists know — and what they don't — about climate change. And that's left some scientists to wonder whether these intensive reviews are still the best way to go.
Sea urchins are considered a culinary delicacy in many parts of the world, including Japan and the United States. The market for this "foie gras of the sea" is growing rapidly — so fast that supply can't keep up with demand.
But a scientist in Birmingham, Ala., says he's found a solution: He's built a sea urchin farm in his lab and has even developed a food for them to make them taste better. Now, he wants to take his tasty urchins out of his farm and into restaurants across the country.
Originally published on Fri September 20, 2013 3:47 pm
Super-typhoon Usagi — the equivalent of a Category 5 hurricane with sustained winds of 150 mph — is expected to skirt the Philippines and Taiwan before slamming into the Chinese coast near Hong Kong over the weekend.
The storm is forecast to skirt the coast of Luzon in the northern Philippines on Friday and brush the southern tip of Taiwan on Saturday. Although it is expected to be downgraded in strength by the time it hits Hong Kong on Sunday evening, Typhoon Usagi could still do considerable damage.
Colorado's record-breaking flood was caused, in part, by a blocking pattern parked over western North America. That same pattern also led to extreme drought in the West, worsening California's Rim Fire. Rutgers atmospheric scientist Jennifer Francis talks about possible connections between climate change and severe events like these.
Now you've probably seen a cutaway section of a tree trunk, those rings inside? Well, they tell a story about the conditions the tree faced year after year. It turns out that whales contain a similar record inside their ears. Joining me now to talk about it are two researchers looking into this record. Stephen Trumble is an assistant professor of biology. Sascha Usenko is an assistant professor of environmental science. They're both at Baylor University in Waco, Texas. Welcome to SCIENCE FRIDAY.
September is peak season for the fall bird migration. Hummingbirds have already made the trip south while songbirds have been slow to move this year. Naturalist and author Kenn Kaufman shares tips on spotting different species and making your yard bird-friendly.
The Environmental Protection Agency's second stab at a proposal to set the first-ever limits on greenhouse gas emissions from new power plants would make it impossible for companies to build the kind of coal-fired plants that have been the country's biggest source of electricity for decades.
Under the proposal, released Friday, any new plant that runs on coal would be permitted to emit only about half as much carbon dioxide as an average coal plant puts into the air today.
The tiny, copper-hued golden lion tamarin is so beloved in Brazil that its image graces the country's 20-real bank note. But this lion-maned monkey is in peril.
There's only one place on earth where the golden lion tamarin lives in the wild: in Brazil's Atlantic Forest, or Mata Atlantica, just north of Rio de Janeiro. Deforestation in the region has reduced the monkey's habitat, once a massive ecosystem stretching for a half-million square miles, to just 2 percent of its original size.
In the quirky little college town of Yellow Springs, Ohio, home to many unconventional ideas over the years, there's now a small insect factory.
It's an unassuming operation, a generic boxy building in a small industrial park. It took me a while even to find a sign with the company's name: EnviroFlight. But its goal is grand: The people at EnviroFlight are hoping that their insects will help our planet grow more food while conserving land and water.
Originally published on Thu September 19, 2013 11:24 am
No one who's been paying attention for, say, the past few decades, needs to be reminded of how extremely polarized Washington is.
So it's usually good news when Democrats and Republicans can come together on an issue, as they did recently to support the idea of creating the new honorary position of "Science Laureate of the United States."
Originally published on Tue September 17, 2013 10:33 am
Matson Inc., the shipping company that spilled 233,000 gallons of molasses into Honolulu Harbor earlier this month, has pledged to pay all the costs stemming from the disaster that has devastated marine life there.
How often do whales clean their ears? Well, never. And so, year after year, their earwax builds up, layer upon layer. According to a study published Monday, these columns of earwax contain a record of chemical pollution in the oceans.
The study used the earwax extracted from the carcass of a blue whale that washed ashore on a California beach back in 2007. Scientists at the Santa Barbara Museum of Natural History collected the wax from inside the skull of the dead whale and preserved it. The column of wax was almost a foot long.
From the standpoint of global warming, burning natural gas can be better than burning coal, a study published this week suggests.
This is a contentious issue among people who are opposed to the natural gas drilling practice known as fracking. That technique involves injecting water, sand and chemicals into wells to release far more gas than conventional drilling can. Opponents of fracking have been concerned not only about local environmental issues, but also about the potential for methane leaks to make global warming worse.
Five years ago this week, a Canadian company proposed building a pipeline to send heavy crude oil from Alberta to U.S. refineries. Although the Obama administration's answer on the Keystone XL pipeline is not expected anytime soon, politicians in Washington and Canada are ramping up the pressure for the project, while environmentalists are pushing hard against it.
Scientists watching Antarctica's Pine Island Glacier from space have noticed with some alarm that it has been surging toward the sea.
If it were to melt entirely, global sea levels would rise by several feet.
The glacier is really, really remote. It's 1,800 miles from McMurdo, the U.S. base station in Antarctica, so just getting there is a challenge. Scientists have rarely been able to get out to the glacier to make direct measurements.
For several weeks now, two unmanned spy planes have been flying over the Atlantic on an unusual mission: gathering intelligence about tropical storms and hurricanes.
The two Global Hawk drones are a central part of NASA's five-year HS3 (Hurricane and Severe Storm Sentinel) Mission investigating why certain weather patterns become hurricanes, and why some hurricanes grow into monster storms.
Originally published on Fri September 13, 2013 3:58 pm
State officials in Hawaii say there's little they can do to clean up a 223,000-gallon molasses spill that has killed thousands of fish, as swimmers, surfers and snorkelers were being warned that the massive die-off could attract sharks.
This is SCIENCE FRIDAY, I'm Ira Flatow. I don't have to tell you that the southwest is in the midst of a record drought, some 14 years in the making, which means the water supply for many Western states - California, Arizona, Utah, Nevada - is drying up. Last month the Bureau of Reclamation announced they're cutting the flow of water into Lake Mead, which has already lost 100 feet of water since the drought began.