Watch David Attenborough's Natural Curiosities Season 4 Episode 1 Online
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- Subtitles: English
Hybrids can be bizarre and they can be deadly. We look at two hybrid animals that owe their existence to human interference – the pizzly bear (a cross between a polar bear and grizzly), which has come into being because of global warming, and the killer bee brought into existence because of the transfer of African bees to South America.
