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The National Institutes of Health has issued a moratorium on funding work that puts human stem cells into nonhuman embryos. The concern is that hybrids might develop human brain cells, sperm or eggs.

Brazil says it has greatly reduced the rate of deforestation. That may be true, critics say, but they argue such figures are misleading because so much of the Amazon has already been degraded.

In an online graphic novel, the only dialogue is the lengthy iTunes Terms and Conditions agreement. Steve Jobs is the main character, and the author gives readers an education in comic book history.

Vice President Ahmed Adheeb was arrested as he came back from a conference in China. He is suspected of playing a role in a speedboat explosion targeting the president.

The Democrats running for president are in Des Moines, Iowa, Saturday night for the annual Jefferson Jackson Dinner, one of the marquee events leading up to January's Iowa caucus.

Secretary of State John Kerry has helped forge an agreement between Israel and Jordan, in an effort to defuse violence between Israelis and Palestinians over the past few weeks.

How are great teachers created? Practice, practice, practice, says Deborah Ball, dean of the University of Michigan School of Education.

Infection and autoimmune activity result in inflammation. And psychiatric researchers now suspect that inflammation may play a role in some cases of depression and other mental illnesses.

Our story on the struggles of first-year teachers caught the attention of a lot of people. Teachers shared advice, personal experiences and encouragement.

Korean Americans are not allowed to partake in the North-South Korean reunions. NPR's Rachel Martin talks to Chahee Stanfield of the National Coalition for the Divided Families about their options.