In this February 2021 episode of Stuff You Should Know, we explore the murky world of blue holes — terrifyingly deep underwater craters that reveal secrets about our ancient world and may even provide answers to today's climate challenges.

Blue holes, as the name suggests, are the underwater cousins of black holes; chasms that largely escape current human comprehension.

Stuff You Should Know is an iHeartRadio podcast covering a broad range of topics, from how sarcasm works to the intricacies of chaos theory.

Hosted by self-described jacks-of-all-trades Josh Clark and Chuck Bryant, this episode from February 2021 dives into the mysteries of blue holes.

From their formation and millennia-long history to the possibilities blue holes may hold for our future, Clark and Bryant guide us around every crevice.

With spotlights on the major blue holes around the world and the people attempting to make sense of them, this episode showcases the staggering amount of information surfacing from these caverns.