Are we alone?

Question

This is a question that has been anwered for a long time. Im sure there are life on other planets for a couple of reasons. Lets take planet earth as an example. Planet earth has an abundance of life, variety of species, and even now we are still finding new species of life. Well think of space as this planet, a smaller scale. Take ants for example, a small colony of ants can occupy a small area, that area looks small to us. But to the ants its a big area and its a great distance to travel from one place to another. They exist, we know they exist, because we see them. Well now take another species of ant on another continent. They also exist because we know they exist. They live in their own world, probably not knowing that there are other species somewhere else. What keeps them from running into the other species, distance and means of transportation. Now the whole universe can be explained in this manner, just in a bigger scale. Well what do you think about this.

Answer 1

While it is improbable that we are not alone, it is also improbable that we will be seeing any of them. The distances are just too great to traverse in a lifetime, even at light speed.

Answer 2

Ive answered this one to many times.

I dont think that intelegent life exists, but life does exist. I know that. Imagine this: A gas Giant. Nothing but clouds oif gas. Inside jupitur. How can life survive? They can float! Blimp-like creatures could fly and be hunted by gliding creatures called "sword tails", or perhaps an organism that has no mouth or nose for breathing, since it abosbs the ice on europa, and gets food by photosynthesis, on the moon of Europa. Or EVEN IN VENUS!!! There could be fat creacures that are resistant to the intence heat, and can last heavy pressure. They eat rocks and metal, and since the surface is boiling hot, they keep standing on one foot, alternating every once in a while. Great thinking, no?

Intelegent life doesn't exist as far as I know, but other forms of life, like the ones I listed, or single celled organisms, could.

My answer is a no. We most certainly think Earth is the only planet where life can thrive, but not all forms of life, even on Earth, need what we need.

Answer 3

First, the probability of we be alone in the Universe is zero, that is a Math view point. Second, everything that exist in world has a reason to exist. The Earth is less than a sand grain in the Universe. Why does the Universe exist for? The Earth exist for us... The Universe exist for everyone: we and they. Who are they? We are they in different conditions. We cannot answer because our conscience is extremely small in this Universe.

Answer 4

I believe that there is life in other parts of our universe and we r not alone.

Let me illustrate:

There are 70 sextillion(i.e 70 thousand million million million, or 7 x 10^22) visible stars, and the number of visible stars is just a very very small fraction of the number of actually existing stars.

Now, lets consider this eqn:

FRANK DRAKE'S EQUATION:

N = Ns fp ne fl fi fc fL

where

Ns = 200 billion = approximate number of stars in the Milky Way galaxy.
fp = 10% = fraction of stars I(I=> Dr Frank Drake) think have planets around them (<2x10^-10 assumed)
ne = 0.33 = number of planets per star I guess are ecologically able to sustain life
fl = 0.000001% (1 of 1,000,000) = fraction of those planets where I think life evolves
fi = 0.000001% (1 of 1,000,000) = fraction of fl where I think intelligent life evolves
fc = 0.0000001% (1 of 10,000,000) = fraction of fi I think can communicate
fL = 1/100,000th (100.000 y) = fraction of time during which I think culture survive.

N = 6.6 x 10^-24 = probabilities on existence of communicating civilizations in Milky Way galaxy. (note: ^ represents "raised to the power of")

This equation was devised by Dr. Frank Drake (a professor at the University of California, Santa Cruz) in the 1960s in an attempt to estimate the number of extraterrestrial civilizations in our galaxy with which we might come in contact. The main purpose of the equation is to allow scientists to quantify the uncertainty of the factors which determine the number of extraterrestrial civilizations.

Now lets disregard the fc (fraction that can communicate) and fi (fraction for intelligent life) parameters, coz ur question is regarding only the existence of life, then

N = 6.6 x 10^-24 / (fc x fi)
= 6.6 x 10^-24 / (10^-7 x 10^-7)
= 6.6 x 10^-10

So this shud be the probability of existence of life within our galaxy(Milky way), lets assume that the number of existing stars in the universe is 700 sextillion(just 10 times more than visible stars today) and apply the Drake eqn to the entire universe, then

number of biological systems having life = N x total number of existing stars
= (6.6 x 10^-10) x (7 x 10^23)
= 46.2 x 10^13

That shows that the entire universe has 462 million million biological systems( you can simply put it as planets) harbouring life. We have concluded this even after considering extreemly skeptical fl numerical value!

Do u still think v r alone?

Answer 5

Without knowing for certain if we are or are not alone, your theory does make sense. We could easily exist in a universe teeming with life, just too far away to notice.

Or, to extend your ant analogy, ants communicate in ways that humans are unable to, and are generally unable to understand. So, for all we know, there could be life relatively nearby, but we can't see that far, and they could be communicating in a way we can't detect, let alone decipher.

We're likely not alone in being the only life in the universe, but for all intents and purposes, we likely are.

Answer 6

WE AREN'T THE ONLY PEOPLE (OR OTHER FORM OF LIFE) THAT'S ASKING THIS QUESTION.
Everybody knows that there's more out there. You're right: We do only take up a small (tiny) amount of this galaxy. There are many places out there that has the good conditions (water, temperature, and gases) for any kind of life form.
Think about it this way:
Suppose our huge galaxy is a tiny atom of another comlex life form, can you imagine the even the more massive world out there? It's a big big world... ...

Answer 7

I dont think so. there may many other planets like the earth. infact 2 yr. before i had see a UFO form my telescope while i was seeing mars. First I thought it might my a mistake and could be another thing but it suddnly expended to its doubble size then disappeared. I told may people but none believed (considering that i was a child then) so i believe

Answer 8

that we are alone.. no... that we will ever see anybody from another place... not in our lifeltime at least... that there is intelligent life... could be.... though we now know that the basic blocks of life..even microorganisms can travel through space by hitching a ride in an asteroid.. it would be an awfull waste of space (and time.. and dimentions) if we are trully alone.. don't you think?

Answer 9

right now? Yeah, I'm alone. Anyone want to keep me company? J/k! haha!

seriously, I believe there are other life forms out there somewhere. But the odds of them being intelligent (humans, apes, etc) is very slim. but it is definately an unknown. We may never know......

Answer 10

I think it would be pretty closed minded to think that in this vast expanse we would be the only lifeform. There are too many suns with planets similar to ours to even imagine they could not have accidently developed something.