If they came at the speed of light, they would be about fourteen billion years old. So, I doubt that theory very much. Not to derail the thread and to make this conversation relevant to the conversation, I would add if the pod were spiritual in nature, dimensionless, unbound by time and space, they could have appeared on earth instantaneously even if at different times, one twin destined for Popehood, the other for hip-wagging and slick hairddo’s. I really don’t have an opinion on the matter, but
I can’t disprove the possibility that Elvis is on Tralfamador.