New research suggests that there could be millions of planets similar to ours, harbouring life forms, although at this stage the proof is still in the imagination.

Two Aussie physicists, from the University of New South Wales in Sydney, are saying that should there be other Earth-like planets out there (and the evidence shows that planets are common in solar systems), then at least one in three probably harbours life. Considering the amount of Sun-like stars scattered across the Universe, in countless different solar systems, it stands to reason therefore that the Universe is literally teeming with aliens.