Has MrBeast gone too far? The YouTuber insists his latest death-defying video was tested for safety. But some experts think his whole business model is killing our humanity.
YouTuber under fire over death trap video
Master of clicks: MrBeast has become an entertainment megastar by studying the titles and images that convince viewers to click on his videos. Glossary
Evolution - A process of gradual change that takes place over many generations, during which species of animals, plants, or insects slowly change some of their physical characteristics.
Adapting - Changing.
Cholesterol - A type of blood fat produced by the liver.
Selective pressure - Factors in nature that will make a proportion of the population less or more successful at reproducing, driving natural selection.
Attention economy - The idea that human attention is a scarce commodity, and that attention is the limiting factor in a person's ability to consume information.
Exploitation - Treating someone unfairly in order to benefit from their hard work.