• canuck
    +4

    They would have already spread across the entire universe if this was true.

    • drunkenninja (edited 9 years ago)
      +3

      Actually not necessarily, because of such vast distances between stars and even galaxies its highly unlikely that they have spread too far outside of their own back yard. A while back I read an interesting article about the fermi paradox, it was a great read and recommend it to anyone thats interested in this type of stuff.

    • timex
      +2

      Their probably already here and just observing us