This episode is part of The Best Of series and was originally posted in 2021. Tim Urban’s first appearance on this show remains one of my all-time favourites.Why are you here? Are we alone in the universe? Will we extinguish ourselves? Why do you procrastinate? And what does social media reveal about your chimpanzee mind? Tens of millions of viewers watch philosopher-blogger king Tim Urban wrestle with these questions in TED Talks and on his comic blog, 'Wait But Why'. Spark up a reefer and join Josh on a cosmic journey into a genius mind.