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The original was posted on /r/askhistorians by /u/nmerel on 2023-09-01 14:16:10+00:00.

and dont get me wrong im asking this because generations looks so different for me , also I looked at my family tree and other friends families our great grandparents used to marry at the age of 14 and 15 my great great grandfather was at the age of 13 and fought in world war 1 and had many heroic stories at that age so it came to my mind did the age or the biology of us changed? some at the age of 13 now did not even hit puberty