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Protesters took to the streets across Brazil this weekend to voice outrage over the fires burning through the Amazon.

Amazon's position is that "instead of selling 100,000 copies at $14.95, you would sell 200,000 copies, let's say, at $8.99 or $9.99," says industry analyst Tim Bajarin.

Amazon's voice-cloning technology still under development raises concerns among those who study ethics in artificial intelligence.

Also: North Carolina Poet Laureate Valerie Macon resigns; David Orr on James Franco's poetry.

"Some may seek to deny or delay the clean energy revolution that's underway in America, but nobody — nobody — can reverse it," Biden said. But Trump has vowed to roll back those plans.

As the summit in France wrapped up, Brazil's far-right president tweeted that the international alliance treats his country "as if we were a colony or no man's land."

The leagues secured deals that will bring in $76 billion over the next 11 years, ushering in a new era of streaming. NPR's Michel Martin talks to Wall Street Journal reporter Isabella Simonetti.

Biden and Trump are back on the campaign trail. Amazon will no longer let police use its facial recognition software. And, U.S. Student Xiyue Wang discusses his time in prison in Iran.

Coin tosses, a squeaker of a win and, perhaps even more surprising, humility. That's what characterized Monday night's Iowa caucuses, the first votes cast in the 2016 presidential election.

President Biden is calling for unity to address several current crises, but that will prove difficult in a country as divided as ever.