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The World Beneath Our Feet
Humanity has launched satellites into outer space and submarines to the ocean floor, but the ground below Earth's surface remains shrouded in mystery. Are there profound secrets buried beneath layers of rock, or hidden in vast caves? Can the subterranean world below shed light on humanity's past, or even its future?
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Other episodes for this season
![The World Beneath Our Feet](https://image.tmdb.org/t/p/w300/7I93aqa3q01ywKFncUz9Iiw9zVd.jpg)
![The Time Travelers](https://image.tmdb.org/t/p/w300/4WYK3hZzajRnraSR0tsRno0Y11.jpg)
![Secrets of Ancient Structures](https://image.tmdb.org/t/p/w300/uoFtsH8tMYVgQx5C0KCHIVqHfVV.jpg)
![Mysteries of the Vikings](https://image.tmdb.org/t/p/w300/ukcRr2Lf7lsapFi93noRGqGAmMR.jpg)
![Strange Stories of the Presidents](https://image.tmdb.org/t/p/w300/4SzUQZKlep2dPXMxdcH9Kmtp3Bo.jpg)
![Bizarre Afflictions](https://image.tmdb.org/t/p/w300/744xzl1UnX1jR0YD8wyiwgbRJd3.jpg)
![Strange Technology](https://image.tmdb.org/t/p/w300/wAK8AfaWTAeCXibYsGl8tg5qu9c.jpg)
![Unbreakable Codes](https://image.tmdb.org/t/p/w300/f6JkRsgc6GHN1J7yL4ZSk1fBDXU.jpg)
![Strange Stories of World War II](https://image.tmdb.org/t/p/w300/ythTNCIk4jUegUol8nfiXtkDJrG.jpg)
![Monsters Among Us](https://image.tmdb.org/t/p/w300/ythTNCIk4jUegUol8nfiXtkDJrG.jpg)