so what are your thoughts about other lifeforms? do u there are any? i think there might some somewhere.

I think this post in itself is evidence of semi-intelligent subhuman life forms.

Hahahahhahahahaha ^^

if we are the only ones here what a waste of space i wana see some alien invasions

hahahahahahah 100 % this

Drake equation: Nc = N* fp ne fl fi fc fL

N* represents the number of stars in the Milky Way Galaxy

Question: How many stars are in the Milky Way Galaxy?
Answer: Current estimates are 200 to 400 billion.

fp is the fraction of stars that have planets around them

Question: What percentage of stars have planetary systems?
Answer: Current estimates range from 20% to 50%.

ne number of planets per star that are capable of sustaining life

Question: For each star that has a planetary system, how many planets are capable of sustaining life?
Answer: estimates range from 1 to 2.

fl is the fraction of planets in ne where life evolves

Question: On what percentage of the planets that are capable of sustaining life does life actually evolve?
Answer: Current estimates are 100% (where life can evolve it will) .

fi is the fraction of fl where intelligent life evolves

Question: On the planets where life does evolve, what percentage evolves intelligent life?
Answer: Estimates are 50% .

fc is the fraction of fi that communicate

Question: What percentage of intelligent life forms have the means and the desire to communicate?
Answer: 10% to 20%

fL is fraction of the planet's life during which the communicating civilizations may survive

Question: For each civilization that does communicate, for what
fraction of the planet's life does the civilization survive?
Answer: This is the most vague question. Using the Earth as our model, the expected lifetime
of our Solar System is approximately 10 billion years. Already communication by radio has
been for less than 100 years. How long can our civilization survive without destroy ourselves
as some predict or will we overcome our problems and survive indefinately? If doomsday came
today this figure would be 1/100,000,000th. If we survive for 10,000 more years this figure
would be 1/1,000,000th.

When all of these variables are multiplied, we get:

Nc, the number of communicating civilizations in the galaxy.

Earth can not, and SHOULD not ever be used as a MODEL to find life. The chances that we will find any life similar to humans, and or any lifeforms on Earth (other then bacteria, etc) is SO VERY unlikely.

I will have to disagree.

We use earth as a model to find life, because we know that life can exist on such a planet (we are here arent we?).
From everything we know about how life works, we find that such a planet would be ideal for the development of life as we know it.

Now i agree that there is a chance that life can exist and be supported in places that we might think are uninhabitable (We don't know everything...)

But the safest bet is to assume that life thrives the most on a planet like ours (Again.. We are here arent we).

Now by doing so it does not mean we are looking for life similar to humans per se (It would be stupid to think that, just look at all of the species of earth, not to mention the extinct species and to expect that a life form would evolve so similarly to humans would be absurd even if the planet is an exact copy of earth)... We are just looking for life with a similar chemistry make up as all life currently known to us (Carbon based life forms).

This post was edited by emkoirl on Jan 10 2010 12:05pm

There is no solid evidence due to the fact that the world governments think the topic is too controversial and all information on the subject is classified.
But, in an infinite universe it seems almost impossible for our planet to be the only to inhabit life.

Video related.