The latest research and archive footage explore animal adaptations. The specialised circulatory system of a crocodile helps it to breathe underwater. |
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Title: | Cold Blooded Killers | |
Air Date: | November 21, 2016 | |
Runtime: | 60 min | |
Genres: | Nature | |
BrotherKnumpcy : This was a hard watch and the rabbit holes are even worse. Will America ever know the trut...