In Africa, some ranchers shoot wildlife to keep them from eating the grass out from under their cattle. But it turns out some wildlife, like zebra, actually help cattle graze — by clearing fibrous grass stalks away and promoting the new shoot growth that cows crave.
Philadelphia's Mutter Museum invited Stephen and Timothy Quay to capture the collection of medical oddities in the filmmakers' signature moody, avant-garde style. "We never walk through the front door," the Quays say of their approach to film. "We insist on coming through the side door or the back door."
The Salt is a blog is about what we eat and why we eat it. It's about how food opens doors for discussion all over the world, and how it shapes the world, from culture, to science, to history, to business practices and environmental impacts.
Sometime this week, a school bus-sized satellite will fall to Earth after two decades in orbit. Most of it will burn up in the atmosphere, but some pieces — and one possibly as large as 300 pounds — are expected to hit the ground. But there's little risk that they'll hit a person.
Melissa Block and Lynn Neary learn from researcher Kevin Allan of the University of Aberdeen King's College in Scotland that women remember better when spoken to in a low-pitch voice. This helps women to pick a suitable partner.
In his new book, the Pulitzer Prize-winning author and energy expert looks at how the need for energy is shaping the world. He joins NPR's David Greene to discuss the global implications of natural gas production in the U.S.
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