do aliens exist?

Answer 1

It is possible!! there might be somewhere in the Universe.

Alien/extraterrestrial life is life that exists and originates outside the planet Earth, the only place in the universe currently known by humans to support life. Its existence is still hypothetical as there is currently little, if any, evidence to indicate that other planets can support life, and there is no evidence of extraterrestrial life that has been widely accepted by the scientific community. Some, however, point to moons of Jupiter or other celestial bodies that might conceivably have some forms of life (bacterial or otherwise).

Answer 2

That's a great question. Basically the answer to whether there is life in the universe is always a good one.

To answer your question, It's VERY likely that there other civilizations in this galaxy. The reasons is simple but you have to put up with some math and some history.

Back in the 60's some scientists asked the very same question, and came out with a basic formula that figures that out.

The main idea was fleshed out by a scientist named Frank Drake, he basically put some of the parts of the question together differently and assigned a likelyhood/probability to each.

Drake asked the question this way, what was the likelyhood of us communicating with another technically advanced civilization. Since that question breaks down, into parts that we can discover by looking around the universe, over time , we will be able to make a very good guestimate of how many civilizations are out there.

For instance one "factor" in his equasion was "the likelyhood of a sunlike star"

Another "factor" was "The likelyhood of a sunlike star with planets like Earth" - this gives you the basic idea.

The link here, takes you to a PBS special from some time ago which allows you to plug different numbers in and guess how many other civilizations there might be!

But this is where you can keep an eye on the headlines,

The French have recently launched a space-telescope which should be able to find "Earthlike" planets.

Corot Launched : http://news.bbc.co.uk/2/hi/science/nature/6203161.stm,
when "Corot" finds some planets, we can then do math to figure out how common they are ,and basically "know" one of the numbers Drake only could guess at in the 1960's.

In a few years the US/NASA will - funding allowed - be able to launch an satelite in 2008 called "Kepler" which will search for "Earthlike" finding space-telescope of our own.

http://www.space.com/businesstechnology/technology/tpf_techwed_040526.html

Drake Equation : http://www.pbs.org/wgbh/nova/origins/drake.html

Another question similar to yours is whether we will contact or ever be contacted by an alien civilization.

The SETI program in the 1990's and presently is designed to discovery signals from alien civilizations, and it is regularly if not constantly listening towards the stars for the faintest of signals.

But this question actually has a suprising answer, the answer may ALREADY be yes. The transmission is called the "Wow" signal and was detected on August 15,1977.

IF we asume the "Wow signal" is genuine, we would have been able to detect an alien civilization's message without it being specifically "for" us, which is a rare find, but after only 80 or 90 years could potentially mean the universe is crawling with life!

However, because it's just a fluke since we have not since found another "Wow" type signal,we shouldn't get too excited.

In the movie Contact (based on the Carl Sagan novel), the first 1/2 of the movie shows what a "first contact" situation might actually be like. It's unlikely that the signal would be able to be interpreted in the first couple of years or maybe even decades.

An open and interesting socioloigcal question is what would the immediate aftermath (on Earth) be of a first contact situation, the movie points out some of the "popular" disruptions to society.

Corot : http://news.bbc.co.uk/2/hi/science/nature/6203161.stm
Kepler and Corot : http://www.space.com/businesstechnology/technology/tpf_techwed_040526.html
Drake Equation : http://www.pbs.org/wgbh/nova/origins/drake.html
The WOW signal : http://en.wikipedia.org/wiki/Wow%21_signal
Contact : http://www.imdb.com/title/tt0118884/

Answer 3

We have no idea. It doesn't matter how many stars and galaxies there are, science has no clue what the probability is of intelligent life evolving, and no evidence that we are not completely unique. There's nothing arrogant about that, that's merely the state of the knowledge today -- anything else is just an emotional opinion.

We only have a sample of 9 planets (8, whatever), of which only one has intelligent life. That tells us 1) intelligent life exists, but 2) not on every planet.

But we already knew that.

Answer 4

YES definitely.

The very existence of us prove that life can exist on other planets.

Bear in mind that there are billions of solar systems and galaxies, so there are a big chance that some of the solar systems can support life.

Answer 5

If we are so self-centered to think that this planet is the only place in the universe where life exists, when this planet has tube worms living off sulpher around volcanic fumaroles at extreme depths in the Pacific Ocean, we must be nuts.

Answer 6

Sure there are. Maybe you heard, the Texas Governor's office did a telephone survey and asked people if they thought illegal immigration was a serious problem.

--35% said Yes, it's a serious problem.

--65% said No, no es una problema.
.

Answer 7

That's a really smart question.And yeah they do exist but not in our galaxy

Answer 8

We would have to assume so, otherwise, we'd be quite arrogant. After all, there are millions of galaxies and each have a sun and planets. They might not be just like us, but then again, maybe they are just like us. Again, one would never know. We can only guess. Beam me up Scotty!

Answer 9

YES THEY EXIST

Answer 10

yes