NPR Staff

Advertising is the basic business model of the Internet. It's one reason we can view online content free of charge.

Millions of Web surfers already download software to block ads online, and that number is growing. Soon, Apple could be making mobile ad blocking easier.

In recent years, People for the Ethical Treatment of Animals has waged a protest campaign against SeaWorld, saying that the U.S. theme parks' treatment of trained orcas is cruel. Now, PETA says it has identified a SeaWorld "agent" in its midst.

Flowers, bugs and bees: Stephen Buchmann wanted to study them all when he was a kid.

"I never grew out of my bug-and-dinosaur phase," he tells NPR's Arun Rath. "You know, since about the third grade, I decided I wanted to chase insects, especially bees."

These days, he's living that dream. As a pollination ecologist, he's now taking a particular interest in how flowers attract insects. In his new book, The Reason for Flowers, he looks at more than just the biology of flowers — he dives into the ways they've laid down roots in human history and culture, too.

In one of this year's most intense international competitions, the United States has come out as best in the world — and this time, we're not talking about soccer.

This week, the top-ranked math students from high schools around the country went head-to-head with competitors from more than 100 countries at the International Mathematical Olympiad in Chiang Mai, Thailand. And, for the first time in more than two decades, they won.

In Northern Ireland, "the Troubles" — the long and bloody conflict between Catholic Irish nationalists and pro-British Protestants — formally came to an end with a peace agreement in 1998.

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