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Microsoft's artificial intelligence chatbot was supposed to mimic a teenage girl. Instead, internet trolls tricked it into spouting hate speech. BuzzFeed tech reporter Alex Kantrowitz explains how.

Reporting in the journal Biology Letters, Jeremy Goldbogen and colleagues say blue whales perform underwater acrobatics when they're eating: they rotate 360 degrees while they gulp krill. Reaching 90 feet in length, blue whales are the largest animals on the planet. Goldbogen is studying their dining habits to understand what fuels their growth.

Weekend All Things Considered marks National Poetry Month with Detroit poet Jessica Care Moore. From secrets, to storms, she tells us which mini poems in our Twitter feed caught her eye.

CNN's national security analyst Peter Bergen just returned from Pakistan, where he visited the town where Osama bin Laden was killed. He talks about the various conspiracy theories surrounding bin Laden's death — and how al-Qaida has changed in recent years.

As the world gets hotter, plants and animals have been trying to adjust by changing when they bloom, migrate, molt, and breed. For some species, these adjustments come off nicely and for others they don't. One European bird's chicks now hatch at a time of year when there's not much around for Mom to feed them.

When José Aguilar, a Honduran living in the Mexican border city who runs the restaurant Honduras 504, heard a caravan of mostly Honduran migrants was coming, he knew he had to do something to help.

Artificial intelligence becomes hard to ignore when it starts taking over tasks that used to require human judgment — such as winnowing job applications or prioritizing stories in a news feed.

In his new book journalist Joel Bourne says humanity is facing a major problem: The world is running out of food. There are promising developments to meet the threat, he says, but time is running out.

Criticism is raining down on prosecutors in Massachusetts after the suicide of computer genius Aaron Swartz. His family says Swartz, who was facing trial on wire and computer fraud charges, was the victim of Justice Department overreach. But legal experts say the case is more complicated than that.

The SNL head writers have different attitudes toward co-hosting the Emmy awards Monday night. Jost admits to being nervous, but Che says, "there's nothing to be afraid of."