Nature
Honey badgers survive snake venom that kills almost everything else
Honey badgers routinely eat venomous snakes and take bites that would kill most mammals many times over. Their nicotinic acetylcholine receptors carry the same defensive mutation found in mongooses, pigs and hedgehogs, which stops snake neurotoxins from locking onto nerve and muscle cells. It's a case of unrelated species evolving the identical molecular fix independently.