Just as fish have evolved for the water and birds for the sky, the other life forms in the Universe will fit the niche of their environment. For all we know, there could be a species colonizing the Universe already, but we are just a remote island yet to be discovered. Regardless, like planting a garden, the seed of intelligence must already be there for life to exist and evolve. Other life forms are likely just the harvest of different seeds. The question is: who planted us all?