Legendary astrophysicist Neil deGrasse Tyson shares the view of Tesla founder Elon Musk that AI poses mankind's "biggest existential crisis". Musk made his now-infamous comment during the South by Southwest tech conference in Austin, Texas last year as part of a call for regulation. Musk warned: "I think that's the single biggest existential crisis that we face and the most pressing one." A year later, Neil deGrasse Tyson was asked what he believes to be the biggest threat to mankind during an episode of his StarTalk radio show. Dr Tyson appeared alongside Josh Clark, host of the "Stuff You Should Know" and "The End of The World" podcasts, who was also asked the same question.