Do aliens live among us?!?, do aliens live among us?!?!? [creepymusic] Options

[Warlord]

do any of you think aliens exist from what i can gather LOTS of people claim to have seen a UFO
http://www.mt.net/~watcher/carorbTH.jpg
this pic could be anything really because the darn blob is so small but still could it actually be one
http://www.alexnolan.net/articles/&ufo6.jpg
... now this pic is just stupid to me
that could be just a disk someones tossed in the sky for their dog to catch it or something

but you decide in the poll

[Clazzy]

Nuclear fusion is as follows:
Hydrogen is fused to helium. From there, lots of different elements may be made with Fe-56 being the heaviest possible element (anything after that is inefficient use of energy, this is why all heavy elements usually decay to Fe-56). Carbon, Oxygen and Nitrogen are relatively light and it only takes six, eight and seven protons respectively to make. As such, they're rather common (but still very overwhelmed by the amount of hydrogen and helium, which would be about 99% of the star).
Now a bit of chemistry. Carbon is quite an important element purely because it can form polymers (i.e. bond with up to four more atoms). These polymers (proteins) are absolutely essential to life. The only other element capable of this is Silicon (perhaps Germanium too, but that's not really important). Silicon atoms are too big and won't have as great a pull on electrons in a covalent bond, making the bond weaker. Secondly: we have CO2, they have SiO2. You may notice that the latter is sand, not good for breathing really.
Now, maybe life based on other base elements is possible, I don't know, but it'll be highly improbably given the state of the universe.