Re: Who is John Harrison (Possible SPOILERS or Insane Babbling)
Both timelines of that era share the same pants that are way too tight for their own good. Sperm counts during the mid-to-late 23rd century must have been at historic lows.
Thank heavens for the advanced fertility sciences of the United Federation of Planets.
Remember what cooleddie74 says, kids:
"Don't forget to have a Patrick Swayze Christmas!"