Yukon Territory bright sphere bounced along skyline for 24 minutes - sped off.In the fall of 1993 in the Yukon Territory of Alaska I was driving back from the Beaufort Sea heading south on the Dexter Highway at 3:00 a.m. I was at 63 degrees N by 135 degrees W.In the rear view mirror I noticed a bright yellow round light bouncing along the skyline. I stopped my car and turned off the engine. I got out of the car and watched it for 24 minutes as timed by my Timex watch.This light bounced along the skyline and then sped away.((NUFORC Note: Witness indicates that date of incident is approximate. PD))