Across the Midwestern corn belt, a familiar battle has resumed, hidden in the soil. On one side are tiny, white larvae of the corn rootworm. On the other side are farmers and the insect-killing arsenal of modern agriculture.
In many parts of Africa, elephants are threatened by poaching. But in South Africa, they're doing so well that some game reserves say they're overpopulated. Now, many of those reserves are trying to limit elephant reproduction even while some ecologists believe it's the wrong approach. Willow Belden reports.
If you're having chest pain, your doctor can test you for a heart attack. If you're having hip pain, your doctor could test for osteoarthritis.
But what if you're depressed? Or anxious? Currently there are no physical tests for most disorders that affect the mind. Lab tests like these could transform the field of mental illness. So far efforts to come up with biomarkers for common mental health disorders have proved largely fruitless.
We've all been to concerts and performances that bring us to our feet in wild applause.
WERTHEIMER: But what makes us clap more for some performances than others? You'd think it's obvious: the better the show, the more applause. Think again. New research at Uppsala University in Sweden has revealed that applause spreads through a crowd more like a contagion than a reaction to a performer. Researchers watched audience members respond to academic talks - talks even as dull as this one.
Scientists with the U.S. Geological Survey sample water in Goodwater Creek, Mo., for pesticides and other chemicals that may have run off from the surrounding land.
Credit Abbie Fentress Swanson / Harvest Public Media
America's hugely productive food system is one of its success stories. The nation will export a projected $139.5 billion in agricultural products this fiscal year alone. It's an industry that supports "more than 1 million jobs," according to Agriculture Secretary Tom Vilsack.
But all that productivity has taken a toll on the environment, especially rivers and lakes: Agriculture is the nation's leading cause of impaired water quality, according to the U.S. Environmental Protection Agency.
And now a big fish story. Last month a fisherman off the coast of Sitka, Alaska, brought in a record-breaking shortraker rock-fish. At nearly 40 pounds and three and a half feet long, the bug-eyed, bright orange beast is the biggest fish of its kind ever caught by a recreational fisherman.
Up next, you know, this week was Independence Day, and to celebrate, we're going to be looking at the life of Benjamin Franklin. We know him for his role in the American Revolution, but we're going to look at the great intellectual revolution he brought to America. Maybe you didn't know about that. Well, you can find out more about it in the new book, "The Society for Useful Knowledge: How Benjamin Franklin and Friends Brought the Enlightenment to America."