• Is there life outside of planet Earth?

    Best answer: Most scientists think that there is a high probability that life exists somewhere else in the universe because there are so many galaxies (billions), and each galaxy may contain billions of stars. Therefore there is no reason to believe that earth is the only place in the entire universe suitable for the evolution... show more
    Best answer: Most scientists think that there is a high probability that life exists somewhere else in the universe because there are so many galaxies (billions), and each galaxy may contain billions of stars. Therefore there is no reason to believe that earth is the only place in the entire universe suitable for the evolution of life and the only place in which life evolved from inorganic substances. We find amino acids, one of the building blocks of life, in meteors. The condition of the early earth favored the synthesis of organic compounds including protein. Similar conditions elsewhere on another planet in another solar system would probably result in the evolution of life.

    However, since science relies on evidence, all scientists would agree that there is as yet no evidence of life outside of planet earth. It does not mean that there isn't any extraterrestrial life, but we simply have not found evidence of it yet, so we cannot say that there is extraterrestrial life either, regardless of how likely it may be. A few decades ago, there was no evidence that planets are found outside of our solar system, although scientists also reasoned that they almost certainly existed elsewhere in the universe. Now we have tons of evidence of other planets elsewhere because of new telescopes and new techniques designed to find them. Life, however, may be much harder to detect because even on our own planet, life only existed as single-celled, microscopic organisms for almost 3 billion years before the first multi-cellular organisms evolved. The only way to find them would be to have a physical sample of another planet and look through microscopes. Since the nearest star is too far for us to go to, it would therefore be impossible to sample other planets physically for evidence of microscopic life.

    Only within the past 100 years or so did we invent radio waves to send signals outside of our planet, and humans have evolved 150,000-200,000 years ago. Therefore even if intelligent life were to exist elsewhere in the universe, they may be pretty rare and even rarer are life forms that knows how to send radio waves. Therefore it would be extremely difficult to find them. Therefore we will probably not know within our lifetime whether extraterrestrial life exists or not, even though some scientists are spending time searching for radio waves that may have been sent out by intelligent life elsewhere. Even more improbable are space aliens that are technologically so advanced that they traveled to our planet, not withstanding all those UFO stories.
    48 answers · Biology · 3 days ago
  • What is infinity minus one?

    8 answers · Mathematics · 4 hours ago
  • Is an asteroid really supposed to hit Earth February 25th this year?

    I keep seeing stuff on Facebook that NASA says it supposed to wipe out the planet
    I keep seeing stuff on Facebook that NASA says it supposed to wipe out the planet
    16 answers · Astronomy & Space · 8 hours ago
  • Should we all just admit that there really isnt a scientific explanation for why the world exists?

    And how/why life arose, why we're here, etc? There just isnt a solid explanation yet.
    And how/why life arose, why we're here, etc? There just isnt a solid explanation yet.
    19 answers · Other - Science · 1 day ago
  • Astronomy or Astrology?

    Im torn. I really like space and zodiacs and things like that. I don't believe in any gods or things like that but I really like astrology. I know astrology isn't considered a science but I really like it and was considering learning it but then I started reading into it and many people just call it fake... show more
    Im torn. I really like space and zodiacs and things like that. I don't believe in any gods or things like that but I really like astrology. I know astrology isn't considered a science but I really like it and was considering learning it but then I started reading into it and many people just call it fake and such. So I started slowly looking into astronomy but I realized quickly that a lot of astronomers if not all, don't believe in astrology. I guess my question is really this; I really like astrology and want to get into that but I also was considering astronomy since it pays more even though I really want to be an astrologer. What should I do?
    17 answers · Astronomy & Space · 1 day ago
  • What is meaning of 3 dots arranged in a triangle?

    It comes in Math textbook pretty often.
    It comes in Math textbook pretty often.
    17 answers · Mathematics · 3 days ago
  • Is it possible to produce a microscopic Black Hole with a reactor like one that we have at CERN?

    Best answer: Yes, linear accelerators have been producing micro black holes for YEARS, They evaporate within a few billionths of a second. Computers have to crunch numbers for hours and even days to confirmed that the micro black holes were created. Earth is still here. The linear ... show more
    Best answer: Yes, linear accelerators have been producing micro black holes for YEARS, They evaporate within a few billionths of a second. Computers have to crunch numbers for hours and even days to confirmed that the micro black holes were created. Earth is still here. The linear accelerator at MIT confirmed Hawking radiation really does happen in 2010.. The Large Hadron Collider and other linear accelerators at CERN and in the United States have Created micro black holes. I think one at Stanford or maybe Berkeley have created micro black holes.

    https://www.technologyreview.com/s/42094...
    13 answers · Astronomy & Space · 2 days ago
  • We all know In few coming years earth will be unable to sustain growing human population. Will our governments will agree to kill us?

    Like the elites will have to do something to keep the planet away from that chaos. So will our governments will kill us diretly or indirect. It is definite that earth will one day will unable to produce to feed all that the population. What will happen then
    Like the elites will have to do something to keep the planet away from that chaos. So will our governments will kill us diretly or indirect. It is definite that earth will one day will unable to produce to feed all that the population. What will happen then
    19 answers · Astronomy & Space · 1 day ago
  • What does bonding mean?

    6 answers · Chemistry · 19 hours ago
  • 1 geometry question. 5 stars for best answer!?

    1 geometry question. 5 stars for best answer!?

    Best answer: Reflect triangle ABC in the line AB, giving triangle ABC'. It can be seen that triangle
    ACC' is equilateral so that |AC|=|CC'|=AC'| and |CB|=(1/2)|CC'|.
    And since since sin(30°)=|CB|/AC| =1/2 the correct responce is B.
    Best answer: Reflect triangle ABC in the line AB, giving triangle ABC'. It can be seen that triangle
    ACC' is equilateral so that |AC|=|CC'|=AC'| and |CB|=(1/2)|CC'|.
    And since since sin(30°)=|CB|/AC| =1/2 the correct responce is B.
    14 answers · Mathematics · 2 days ago
  • What happens if a meteor hits earth tomorrow and I am the sole survivor?

    Best answer: You will eventually die and the human race will become extinct when you die.
    Best answer: You will eventually die and the human race will become extinct when you die.
    24 answers · Medicine · 3 days ago
  • Atheists, WHY was the earth and humans created?

    Note...I'm asking why not how
    Note...I'm asking why not how
    67 answers · Other - Science · 5 days ago
  • Is 2\3 greater than 4\6?

    42 answers · Mathematics · 4 days ago
  • Is mother as important as father in creation of baby or does the baby actually come from father'?

    My grandmother says that you are determined to have the father you have, because the baby comes from sperm, but if your father had another wife she would be the mother.
    My grandmother says that you are determined to have the father you have, because the baby comes from sperm, but if your father had another wife she would be the mother.
    21 answers · Biology · 4 days ago