Quoting Wikipedia , the hypotheses regarding the origin of extraterrestrial life , if any , are as follows : No one said that life may have emerged independently from different places in the universe .
Alternative hypothesis is panspermia that life emerges from one location , then spreads between habitable planets .
Both hypotheses are not mutually exclusive . Studies and theories of extraterrestrial life is known as astrobiology , eksobiologi or xenobiologi . Forms of extraterrestrial life range from large-scale bacterial life to the intelligent beings .
Although hypotheses and theories continue to flourish once more popping up , but others argue and say that what has been done by researchers and astronomers are futile thing because it is only on earth who had a life .
However , a unique and interesting statements that have been revealed at the time of the seminar at the UK Centre in April is not just hunt astrobiology existence of aliens , but rather to answer whether there is extraterrestrial life ?
Scientists at the seminar also said , " It is up to now not been found with certainty and no physical evidence of the existence of a single micro - organism or a single -celled bacteria also from outside the earth , but the thought is the Milky Way galaxy may contain billions of planets and billions of stars . beyond the Milky Way there are billions of other galaxies . then became a strange thing if from the billions of earth only place that had a life . "
Indeed, until now the debate continues and did not know until when it will end , but according to your own , is it true that the earth is only inhabited by living things ?
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