Morning running

It finally occurred to me today why I like to run in the morning, other than it's easier than trying to motivate after a long day of work and traffic.  When I start my run, it's dark and the stars are out.  At the end of my run, the sky is lighter, the stars are gone and the first hints of sun are showing.  In my head, I'm running from one day to the next.  The sci-fi geek in me thinks of it as time travel I guess.