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Bengt Holst said euthanizing the two-year-old giraffe was for the good of the greater giraffe population and it also served as an opportunity to "educate people."

Iraqi officials believe a belt packed with explosives detonated as an instructor was conducting a demonstration. About 20 militants were killed and 15 or so were wounded. It appears that no innocent bystanders were hurt.

There haven't been any pronouncements in favor of gay rights at news conferences or on medal stands yet. And LGBT activists aren't too surprised.

Skipping a meal triggers the munchies in a similar way that marijuana does, a study in mice finds. And it works, at least in rodents, by boosting the sense of smell. Receptors in the brain that get activated when the animals are stoned also light up after they've been fasting.

In his new book, Dr. Kevin Fong explores how humans survive extremes of heat, cold, outer space and deep sea. "We're still exploring the human body and what medicine can do in the same way that the great explorers of the 20th century and every age before them explored the world," he says.

In a major address, Hassan Rouhani mocked U.S. military threats. But he also used the 35th anniversary of the Islamic revolution to say that negotiations with the U.S. and others offers the best path for Iran.

The astronauts aboard the International Space Station give us a view of the Olympics that we haven't seen.

Congressional reporters quickly note that Rep. Paul Ryan was one of many Republicans who voted "no." The vote came after the Republican majority abandoned its hopes to tie other legislation to the debt measure.

Nearly three years after the federal government issued guidelines for dealing with sexual misconduct on campus, administrators are meeting at the University of Virginia to discuss problems and progress. As Sandy Hausman of member station WVTF reports, leaders in higher education say they're struggling to understand and manage sexual assaults in the age of "hooking up."

Republican House Speaker John Boehner has said for months that he would not let the United States default on its debt, and he made good on that promise: The House voted Tuesday evening for an increase of the debt limit with no strings attached, just as President Obama had wanted.