Originally published on Thu August 23, 2012 12:35 pm
<strong>1909.</strong> Facing nearly due west from ridge northeast of Como Lake. Light selection cut in open ponderosa pine. Ground cover is comprised of perennial grasses and forbs, including basalmroot. A few low-growing bitterbrush plants can be seen in the vicinity of horses and in distance on left. A group of willows can be seen behind horsemen at left center.
Credit Photo 87357 / U.S. Forest Service
Intense forest fires have been raging across the western United States this summer. So far this year, nearly 43,000 wildfires have torched almost 7 million acres of land.
As NPR Science correspondent Christopher Joyce and photographer David Gilkey report from Arizona and New Mexico this week, the forests of the American Southwest have become so overgrown that they're essentially tinderboxes just waiting for a spark.
Roger Angel, an astronomer at the University of Arizona, stands in front of his new project: a solar tracker. Angel wants to use the device to harness Arizona's abundant sunlight and turn it into usable energy.
You may not be familiar with the name Roger Angel, but if there were ever a scientist with a creative streak a mile wide, it would be he.
Angel is an astronomer. He's famous for developing an entirely new way of making really large, incredibly precise telescope mirrors. But his creativity doesn't stop there. He's now turned his attention to solar power, hoping to use the tricks he learned from capturing distant light from stars to do a more cost-efficient job of capturing light from the Sun.
Older dads add more genetic mutations to the family tree.
Scientists have found solid evidence that older men have more random mutations in their sperm cells. They're warning that can cause autism, schizophrenia and a long list of other genetic diseases in their offspring.
The new report, in the journal Nature, comes from deCODE Genetics, an Icelandic firm that studied the entire genomes of 78 families involving 219 individuals.
Rotten jackfruit and tomatoes are sorted at a dump in New Delhi. India loses an estimated 40 percent of its produce harvest for lack of infrastructure. And Americans waste about 40 percent of our food.
Credit Mustafa Quraishi / AP
The food world is buzzing today about the latest news on just how often we waste perfectly good food. And we admit, the statistics are pretty depressing.
About 40 percent of food in the United States today goes uneaten. The average American consumer wastes 10 times as much food as someone in Southeast Asia — up 50 percent from Americans in the 1970s. Yet, 1 in 6 Americans doesn't have enough to eat, says the U.S. Department of Agriculture. And food waste costs us about $165 billion a year and sucks up 25 percent of our freshwater supply.
The Larsen B ice shelf, a large floating ice mass on the eastern side of the Antarctic Peninsula, shattered and separated from the continent 10 years ago. A NASA satellite captured the event in this image from Feb. 23, 2002. The 650 foot-thick, 1,250-square-mile ice shelf had existed since the last ice age.
Ten years ago, a piece of ice the size of Rhode Island disintegrated and melted in the waters off Antarctica. Two other massive ice shelves along the Antarctic Peninsula had suffered similar fates a few years before. The events became poster children for the effects of global warming. But a new study finds that the story isn't quite so simple.
There's no question that unusually warm air triggered the final demise of these huge chunks of ice. But a lingering question is whether these events can be attributed to human-induced global warming.
This is TALK OF THE NATION. I'm Neal Conan in Washington. Parts of the country have suffered from record heat and drought for several years in a row now, and this summer, it's been just brutal. In past programs, we talked with farmers about their crops. Today, we focus on difficult choices facing ranchers and dairy farmers.
Originally published on Thu August 23, 2012 2:34 pm
Childhood obesity is on the rise in many countries and overuse of antibiotics is now on the radar as a possible factor in the epidemic. Here 18-month-old twins are weighed in a nutritionist's office in Colombia.
Credit Raul Arboleda / AFP/Getty Images
There's growing evidence that the bacteria in our gut influence our health, including how much we weigh. So what happens when antibiotics knock out some of the microbes that help us?
A study, published online today in the journal Nature, finds that antibiotics make young mice fatter by changing the mix of their gut bacteria.
A tenuous thread of dark matter is seen connecting the galaxy clusters Abell 222 and 223.
Credit Courtesy Jörg Dietrich/Universitäts-Sternwarte München
When astronomers survey the universe, the landmarks are galaxies, those gigantic agglomerates of stars and interstellar gas spread across the immensity of space. A typical spiral galaxy, like our own Milky Way, boasts hundreds of billions of stars grouped along hundreds of thousands of light-years. That means that it takes a beam of light all that time to go from one extreme of the galaxy to the other, traveling, as light does in a vacuum, at 186,282 miles per second.