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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?
Дата первого эфира : Jul 19, 2019
Дата последнего выхода в эфир : Dec 22, 2023
Эпизод : 83 Эпизод
Сезон : 6 Сезон
Время выполнения: 43 минут
Студия: History
Страна: United States of America
В ролях: William Shatner, Tok Thompson
Экипаж:
