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Nearly 30 countries, including the U.S., had refused to sign the non-binding contract in December. Brazil's administration has promised to defend "national sovereignty."

The way we produce food and manage land must change radically if humans hope to avoid catastrophic global temperature rise, according to a new report by the United Nations panel on climate change.

"You have stolen my dreams, and my childhood, with your empty words. And yet I'm one of the lucky ones," activist Greta Thunberg, 16, tells world leaders.

A United Nations report on the status of the global AIDS epidemic estimates that there are 38 million people infected with HIV. The spread of HIV, the virus that causes AIDS, is slowing in the Caribbean and some parts of Africa. But it is taking off in Russia and Eastern Europe.

Mikael Owunna's new book captures the stories of LGBTQ African immigrants, refugees and asylum-seekers reconciling their identity and their heritage.

The president has harsh words for North Korea's leader, whom he refers to as "Rocket Man." He also calls the Iran deal "an embarrassment to the United States."

When the next round of climate talks was suddenly moved to Europe, the young activist needed to hitch a ride back across the Atlantic. And she had a message for the U.S. as she waved farewell.

Operations against the Rohingya look like a "textbook example of ethnic cleansing," the U.N. human rights chief says. But Myanmar's civilian leader, a Nobel Peace Prize winner, denies the allegations.

David Kaye, now a law professor at the University of California, Irvine, says privately sold software that's being used to spy on journalists, dissidents and others is a threat to democracy.

They broke taboos and stereotypes around the world. They include the co-recipient of this year's Nobel Peace Prize, a disability activist — and a 101-year-old runner.