The Platypus: Australia's most outstanding animal: a thread. 1/16pic.twitter.com/48wG7Y3RbY
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Platypuses are born with teeth, but soon lose them. As adults they chew with keratinised pads akin to fingernails or callouses. 12/16pic.twitter.com/uY13tpWhxz
Platypuses are not fans of much human music, save for 1960s avant-garde jazz. They abhor hip-hop. 13/16pic.twitter.com/XYsGcUzVXz
Due to an administrative error by the Federal government in 1922, a platypus named Barry was accidentally listed on a Senate election ballot in Queensland. He finished third. 14/16pic.twitter.com/Ufly7C8a94
Platypuses are not born with their bills; they must wrest them from wood ducks at the age of two in a rudimentary rite of passage. 15/16pic.twitter.com/6ch8jwsW6g
All Australian children are educated at a young age of the risk of platypus attack, and drills are regularly run in schools to prepare for the bi-annual platypus swarms that affect river-side suburbs. 16/16pic.twitter.com/ODUeZgsBeJ
I think you mean two *sex* chromosomes 
Probably.
Most mammals have two allosomes (sex chromosomes) and various autosomes (non sex hormones). Humans have 46 in total for example.
@martinalexsmith challenge?
I'm pretty sure I only have 1, so I concede.
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