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A drop in the numbers of fierce beasts worldwide might seem like good news for deer and antelope. But expanding herds of grass-eaters leave stream banks naked and vulnerable to erosion, and can even change the stream's course, according to scientists calling for more protection of large predators.

Want to top your pancakes with something other than maple? The alternatives vary, depending on the types of trees in a region. There's Kahiltna birch syrup made in Alaska, blue spruce pine syrup from Utah and Georgian black walnut syrup.

Urban farmers are eyeing rooftops that are already green as potential sites to grow food. But there are big obstacles to rooftop farming — from permitting to transporting water and soil to the top of a building.

Not only are Brazilian artists now getting big play in major museums around the world, but something new is happening inside Brazil: There's a burgeoning appetite for art.

A protest in the Russian Arctic has dramatized growing problems with oil drilling there. Every country has a stake in the enormously lucrative search for oil and gas in the Arctic, says professor Lawton Brigham. But pollution from reckless attempts at development are evident on an island near the Polar circle.

AIPAC has blanketed Capitol Hill with lobbyists trying to convince Congress to authorize a military strike against Syria. But despite its close ties with many lawmakers, the lobby has had little success.

The revelations about U.S. intercepts of terrorist communications might have been intended to reassure the public about the government's vigilance. But they also might have been about providing political cover.

Tlacoyos are a doughy corn tortilla of sorts that's cooked on a grill. Whether enjoyed on a plastic plate as street food or fine china in a high-end restaurant, it's been a favorite snack for centuries.

The city of London boasts centuries of architectural history. But a building boom is threatening the city's traditionally low-rise aesthetic and the views of some of that history. Critics — including UNESCO — are very worried about London's changing skyline.

President Obama leaves Wednesday morning for a week-long tour through three African countries. It's his first extended visit to the continent as president. He'll be making stops in Senegal, South Africa and Tanzania.