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The original was posted on /r/todayilearned by /u/gullydon on 2025-07-27 12:19:07+00:00.

Original Title: TIL the Irish Elk, a deer type that went extinct around 7,700 years ago, had the largest antlers of any known deer (span 3.5 metres across), which developed because female elk chose their mates based on antler size. In the end, alongside human hunting, it contributed to the species extinction.