Bruno Pereira has been considered one of the great Indigenous protectors of his generation. And this has made him an enemy of a man called Amarildo da Costa de Oliveira, also known as Pelado. The Guardian’s Latin America correspondent Tom Phillips reports on the story of these two men – Bruno and Pelado – and what happened when their paths collide

What took British journalist Dom Phillips from the club nights of the UK dance scene as editor of MixMag to one of the most remote, and dangerous, corners of the Amazon rainforest? In 2022, Dom set off on a reporting trip with Bruno Pereira, a Brazilian expert on uncontacted tribes, into the Javari valley, to investigate the criminal gangs threatening this region. And then they vanished

Three years ago, British journalist Dom Phillips and Brazilian indigenous defender Bruno Pereira vanished while on a reporting trip near Brazil’s remote Javari valley. The Guardian’s Latin America correspondent, Tom Phillips, investigates what happened in the first episode of a new six-part investigative podcast series

In one of the most remote corners of the Amazon jungle, a journalist and an indigenous defender disappear without a trace. Missing in the Amazon – our new six-part investigative podcast series uncovers what happened to Dom Phillips and Bruno Pereira. Told for the first time by the people closest to them

For decades, Eliezer Yudkowsky has been trying to warn the world about the dangers of AI. And now people are finally listening to him. But is it too late?

In January 2020, Robert Williams was arrested by Detroit police for a crime he had not committed. The officers were acting on a tip not from a witness or informant. In fact, not from a person at all

Two stories about the way AI could – in fact, already is – making the world better. In Montana, when Lee Johnson discovered his wife, Yokie, had cancer, he turned to AI – and was surprised by the answers he got. Meanwhile, in Massachusetts Prof Regina Barzilay’s experience with cancer has led her to build an AI system that can detect the disease years before a human

When Eugenia Kuyda created Replika, the AI companion app, she had no idea it would be downloaded millions of times all around the world. The results were more powerful than she could ever have predicted. But so was the backlash

For the past six months, Guardian journalist Michael Safi has been trying to find out who is behind an AI company that creates deepfakes. Deepfakes that are causing havoc around the world, with police and lawmakers baffled about how to deal with them. And in trying to answer one question, he has been left with a bigger one: is AI going to make it impossible to sort fact from fiction?

This is the story of Geoffrey Hinton, a man who set out to understand the brain and ended up working with a group of researchers who invented a technology so powerful that even they don’t truly understand how it works. This is about a collision between two mysterious intelligences – two black boxes – human and artificial. And it’s already having profound consequences