The idea that we aren’t the first advanced civilization to live on Earth sounds like a fringe theory, but it raises a good question: How can we be so sure that a civilization didn’t arise and die on Earth so long ago that any trace of it has been erased?See omnystudio.com/listener for privacy information.

Even the dullest hockey game is worth seeing when the Zamboni comes out to resurface the ice.See omnystudio.com/listener for privacy information.

Taking care of 12,000 tons of residential trash every day is a hard job. But how does that even work? Listen in to marvel at the NYC sanitation system.See omnystudio.com/listener for privacy information.

Despite as much as one percent of the adult population having the condition, science doesn't actually know how stuttering works. The best it's come up with so far: there seems to be an issue between the physical process of speaking and the thought process that underlies it. Find out what science means by this in this classic episode.See omnystudio.com/listener...

Sometimes you just have to turn it off for a while – all the thinking, and overthinking, analyzing, and figuring out. Sometimes it’s nice to just breathe through your mouth and talk about dumb things criminals do for an episode.See omnystudio.com/listener for privacy information.

We all know the story of the Titanic and the tragedy of lives lost. So hey, let's talk about the survivors for a change!See omnystudio.com/listener for privacy information.