I'm a UFO and so is my wife.
Some, not all of them though!
And Independance Day
Quoted from somewhere -
Exobiology is interesting but pretty pointless, all we can theorise is that given the current parameters needed for life of which we know, aliens would need to follow similar and in some cases identical biology to exist.
Silicon based life is featured in sci-fi a lot, and theoretically the silicon atom has its graces for being the building block of life. However it's far more likely, that carbon based is the way to go, and possibly the only way if what we know so far is largely correct. Even on earth, with abundant silicon, all life is carbon based. If the Earth is a case study of what life typically looks like in the universe, there'd no real surprise if intelligent aliens were:
Carbon based
Respire with oxygen
Darwinian in nature
Possibly bi-pedal (freeing up two limbs allowed us to soar)
Forward facing eyes, large cranium
Agreed, and if they have the capability to travel billions of light years just to observe us then they'd do it from within Space using their super duper telescopes and probes instead of crop circling our fields and tipping our cows.
Nothing gives as solid data as a good old fashioned anal probe.
I pitty the alien which probes me today. Been having some troubles.
There are other forms of life, one which uses Arsenic instead of Phosphorous as one of the 6 basic requirement of life (CHNOPS) and also Loricifera which is Anaerobic (doesn't respire with Oxygen).

Agreed, and if they have the capability to travel billions of light years just to observe us then they'd do it from within Space using their super duper telescopes and probes instead of crop circling our fields and tipping our cows.
You are giving human desires emotions to superior beings.
Look at the emotion on Mr Roboto's shiny metal face!![/QUOTE]
What are you talking about? You're smoking the funny stuff again. :p