posted on Aug, 17 2008 @ 09:03 AM
Yes, the theory of time travellers is a solid, leading theory right now.
If time travel is proven false one day, then we'd have to go with another theory, such as the universal form of evolution into intelligent life
theory. This theory states that regardless of which planet you come from, from which creature you evolved from, since the beginning of time, you will
eventually reach a point in evolution where you take a humanoid form.
This would mean you could have cat people, dog people, lizard people, insect people, plant people, tall people, short people, giants, elf like people,
other plainly homo-sapien people ... the list keeps going..