(from left) Danielle Cormack, Alison Bruce, Lucy Lawless, Renee O'Connor on set of XENA: WARRIOR...
Universal/courtesy Everett / Everett CollectionSimilar to how bats use sound to navigate in the dark Daniel uses a click sound to perceive the presence of objects.
Unique night vision and thermal cameras penetrate the darkness to reveal Africa's notorious hyenas hunting in their element....
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