![](https://image.tmdb.org/t/p/w342/k4jKrJ03pJPyDJgHGQU6au8gpRL.jpg)
43.901 الآراء
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?
تاريخ البث الأول : Jul 19, 2019
تاريخ آخر بث : Dec 22, 2023
حلقة : 83 حلقة
الموسم : 6 الموسم
مدة العرض: 43 الدقائق
ستوديو: History
المصبوب: William Shatner, Tok Thompson
طاقم: