What is the probability  to meet extra terestrial life on Earth in the next 5 years ?
602742
Pessimists. Hahaha. No one knows. If you even believe in aliens then the chance could be anywhere from 1-100%. I sure hope it happens in my lifetime.
1184402
Yes, we will discover other planets that also sustain life, and we will do so within our lifetime.  I do not mean that we will physically go to these planets but we will discover this by placing much more powerful telescopes in orbit around Earth.  There is a definite signature that we will be looking for and that will be the presence of Oxygen in another planet's atmosphere.  If a planet does not have any oxygen in its atmosphere then it would not be able to support life.  There was a time billions of years ago on Earth when there was no oxygen in the atmosphere and at that time there was no life on Earth.  We may not discover other intelligent life on other planet's during our lifetime but i am sure that we will discover other planets that are supporting at least plant life if not primordial single cell life as well.
306692
of course. As long there is a living thing outside space, they r aliens. The possibility is low but the no. of planet is almost infinity so the possibility increases.
1034372
Lets look at the maths. If every star in this galaxy was a grain of sand ( approx. 100 billion ) you would have enough sand to fill an Olympic size swimming pool. how many habitable planets around each star ? Between 0 and 5 maybe. \n  There are approx 100 billion galaxies. Again if each star was a grain of sand  there would be more sand than on every beach on earth. The chances are there is life elsewhere and in all probability the seeds of life on earth came from somewhere else  as explained by the panspermia hypothesis.\n   And the alien abductions? ,,,we're just studying  8)
1166435
Yes.  The sun will blow up in about 4.5 billion years, taking the earth with it.  Odds are humans will have been gone long before that though.
396208
i do because there are many galaxies are there. but you just wait because in the next 20 years we'll  be able to detect alien life forms other than our planet because if there are those aliens are trying to contact with us by waves (like we use on our planets for example, radio waves.) there is evidence that life used to exist on mars. not like life like us (like mircoscopic things). there are many stories that aliens have come to visit our planet. can be true because as they are as they are described in the movies all these phonomenons are happening buts its not possible for us yet to go visit another galaxy. not eveough human years. but in the next upcoming years we'l have ships that will be able to jump into time. as we are doing right now for example, when a space shuttle stays in orbit for atleast a year, they jump into time by 3.8 seconds. its hard to believe but its true . in star trek when they jump into time there using those worm holes. they exist but there so damn small that we have to enlarge them. there smaller than an atom. as phsyics desribres its not possible to go as fast as the speed of light it'll be possible in the next upcoming years. (i dont no when though) but if we go any faaster than the speed of light we'll be crushed by the gravity so that is why we'll be using worm holes and that is one way that we'll be able to visit other galaxies. i hope i stay alive doing that time lol
410370
These are good questions, and about the only way to answer them is by example.\n\nImagine you live in Australia and someone in England tosses a bottle with a message into the ocean.  Now -- assume that bottle never gets washed up anywhere or caught in seaweed, but just keeps on floating around and around, what are the chances of you finding that bottle if you go down to the beach and watch for it EVERY DAY.\n\nNow multiply that by a billion and you have a general idea of how big space is and how unlikely we'll detect radio signals from intelligent extraterrestrial life.  But it's worth listening anyway.\n\nAnother assumption that you didn't consider -- Humans have only been using "radio" waves for a little over 100 years.  SETI's assumption is that we're either going to catch an alien civilization at the time when they are using radio to communicate, or that aliens broadcast in radio in a conscious attempt to communicate with other lifeforms.  That's a pretty big "if".
759134
I'm afraid its "Goodnight Vienna" for us. As this is unlikely to happen for another 5 billion years or so though, there is a fair chance that we will have blown ourselves up or evolved into something a little more intelligent and cleared off elsewhere by the time it happens.\n\nAlthough the Sun uses up around 5 million tons of hydrogen every second, it still has enough left in its core to last for another 5 billion years or so. When it finally does run out of fuel, though, it will swell up to many times its present size and become what is known as a red giant. \n \nThe outer layers of the Sun will grow to swallow up the planets Mercury and Venus and they may even reach out as far as Earth. Way before the Earth is swallowed the surface of our planet will be scorched, its oceans boiled dry and most of the atmosphere will be stripped away.\n\nAs a red giant, the Sun might be able to exist for a few more million years. During this time it will shed matter quite quickly. The solar wind will strengthen to a solar gale. Finally, the Sun may cast off most of its outer layers as a bright shell of gas called a planetary nebula.\n\nAll that will be left behind is a very hot, dense core. The Sun, in fact, will have become a white dwarf - a star no bigger than the Earth. Gradually, over many millions of years, even this small star will cool. The Sun will end its days quietly as a dimming ember in space.\n\nThe attached link shows a photo of a star similar to the Sun in its death throes.
937907
Approximately 5,000,000,000 years
1107979
Definitely.  In only a few billion years our sun will expand and make our planet uninhabitable.  Long before that things will get very difficult for life on this planet.  Evolution of communities of organisms that can travel interstellarly is essentially impossible without intelligence.  The only real way for this experiment in complex life to persist in this universe will be through the actions taken by humans and posthuman intelligent life.  Without the evolution of intelligence, life is doomed to live out a fairly short span of time relative to the duration of the universe in its current life-friendly status.
27597
Current population of the World 6,490,909,958.\n\nThis is as of 5 27AM eastern time.  \n\nBut there is only a correct answer for a certain amount of time as someone is born every second.  Also you have to factor in whether or not there is an extraterrestrial existence.
843987
NO.\nCould be end of times for humans but not for Earth.
611976
Definitely.  Even if its just some microbes out in space, just the sheer number of planets and stars etc I would think there would have to be other life out there!
482291
Nah, probably not like this. Very probable that there's a planet with intelligent life though.
810232
It is estimated that Earth is bombarded by a city-sized asteroid once every 65mil yrs.\ni) Assuming a Poisson distribution, find the probability that Earth will be hit by 2 or less of such asteroids in the next 10000yrs.\nEta Carinae is a suspected hypernova that is 7000 light-years away from Earth. Scientists have observed 200 of such star in many distant galaxies. It was found that the stars have an average life-span of 200mil years with variance 2500mil yrs^2.\nii) Construct a 95% confidence interval for the mean lifespan of Eta Carinae, giving your answer correct to 8 significant figures.\nIt was found later that Eta Carinae was formed 200.01mil yrs ago. \niii) Using the sample of 200 stars earlier, a scientist boldly claimed that Eta Carinae will explode today, causing devastation to Earth in 7000years’ time. By stating clearly the null and alternate hypothesis, test the scientist's claim at 5% level of significance.\nYou may assume the normality of the population of stars observed.
13800
The problem with your question is that assumes that there are only to possibilities; we're alone, or there are little green men walking around.  \n\nChances are that there is some form of life other than ours in the universe, but it more than likely will be much more different than just having different skin and being a different size.  Think about how weird all the animals at the bottom of the ocean.  Then think about how similar their need for water, oxygen, food, how similar their DNA is to ours.\n\nNow try to imagine life evolving on world rich in totally different elements, exposed to total different frequencies and concentrations of energy.  The thing about life on other planets isn't really whether or not it's out there, but whether or not we'd even be able to recognize it when we see it.  \n\nThat and the fact that it takes years just to move from one solar system to the next.  Just getting to another planet capable of supporting life would more than likely take decades, even centuries with any conceivable technology(though an alien lifespan could make that less significant).  Any alien capable of travelling that distance, whether by nature or technology, would once again likely be so different from us that we would never recognize one another as living beings.  So there you go, little green men, probably not, alone in the universe, who can say.
619017
you will not know the world in 5 years, like it is today.\n\nLets sit back and watch.\n\n\nTODAY........is the best your going to see this world from now on.\n\n\n.  :)    Time tells....all*