Originally posted by lukeiamyourdad
hmm... this could mean Padmé gives birth to him on Dagobah...
Maybe that's where Anakin makes his final jump to the dark side...it could explain the presence of the dark side in the cave.
No, the dark side presence came from a powerful Dark Jedi/Sith (don't remember specificly which) that Yoda fought some time before even Episode 1. When Yoda struck down his opponent, the dark side energy was infused into a nearby tree/cave.