Lake Baikal contains about 20 percent of the world’s unfrozen surface freshwater. Image: TATYANA MAKEYEVA / Getty Images

What’s the weirdest thing you learned this week? Well, whatever it is, we promise you’ll have an even weirder answer if you listen to Popular Science ’s hit podcast . The Weirdest Thing I Learned This Week hits Spotify , YouTube , Apple , and everywhere else you listen to podcasts every-other Wednesday morning. It’s your new favorite source for the strangest science-adjacent facts, figures, and Wikipedia spirals the editors of Popular Science can muster. If you like the stories in this post, we guarantee you’ll love the show.

FACT: The weirdest lake on Earth? It just might be Lake Baikal.

Featuring Geo Rutherford

This week’s episode features special guest Geo Rutherford , who you almost certainly know (at least from the forehead-up) as the host of “Spooky Lake Month.” Geo is also the author of a new book about yet another subject in haunted hydrology: spooky rivers .…