Is our earth a cosmic aberration? It’s a no-brainer. The fantasy about extra-terrestrials – little green men- coming from faraway planets and befriending us or mostly attacking us, has been in vogue for quite a while now. The number of Hollywood movies including blockbusters and flops alike dealing with this topic has been increasing phenomenally in the last few years, may be decades. The use of computer graphics interface or CGI has been able to make a more appealing or ‘realistic’ portrayal of catastrophic damage inflicted by nefarious aliens on earth. To the common man on earth, this kind of existence of an advanced extra-terrestrial civilization on an unknown planet is something he is not worried about, and of course, for him, it is difficult to ponder over 'what it really means’. Its existence ends at the movie theater; it no longer exists beyond the realm of science-fiction. Some scientists – we can call them astronomers, or may be ‘atrobiologists’ – seriously th...