New study concludes: Life on Earth is premature, Aliens are yet to evolve



According to a new study, Alien beings are yet to develop elsewhere in the universe and life on planet Earth may be premature


Alien Life yet to evolve
Scientists explain that not only must the host star survive long enough to allow the formation of planets, but it must also ‘wait’ long enough in order to allow for enough cooling in a view to create liquid water on its surface.

A new study argues that, on a cosmic scale, life on Earth may be premature, and after a few million years from now, life in the universe will be easier to find.

The study published in arXiv, discusses the factors necessary for the emergence of life, citing the lifetime of a host star as the dominant factor.

While some scientists argue that life in the universe may have preceded us by billions of years, researchers from Harvard and Oxford universities believe otherwise.

“If you ask, ‘When is life most likely to emerge?’ you might naively say, Now,” says lead author Avi Loeb of the Harvard-Smithsonian Center for Astrophysics.

“But we find that the chance of life grows much higher in the distant future.”

Researchers go on and explain how they believe that the emergence of life elsewhere in the cosmos may be very dependent on a planet’s host star.

Scientists explain that not only must the host star survive long enough to allow the formation of planets, but it must also ‘wait’ long enough in order to allow for enough cooling in a view to create liquid water on its surface.

Interestingly, researchers believe that it took roughly 30 million years after the Big Bang for the first stars ni the universe to form, and planet Earth didn’t come into existence until 4.6 billion years ago.

“Life requires stars for two reasons,” the authors explained in the study.

“Stars are needed to produce the heavy elements (carbon, oxygen and so on, up to iron) out of which rocky planets and the molecules of life are made. Stars also provide a heat source for powering the chemistry of life on the surface of their planets. Each star is surrounded by a habitable zone where the surface temperature of a planet allows liquid water to exist.”

Through the study researchers were able to determine that stars that have a higher mass will actually have a shorter lifespan; stars that have three times the mass of our sun will die out soon before life can revolve en planets in their vicinity.

However, stars that weight less than 10 percent of our Sun’s mass are able to survive for 10 TRILLION years, providing enough time for life to emerge.

This in turn means that over time, the odds of life coming into existence become much higher, in fact, 1000 times higher in the distant future than now researchers conclude.

“So then you may ask, why aren’t we living in the future next to a low-mass star?” says Loeb.

“One possibility is we’re premature.”

“Another possibility is that the environment around a low-mass star is hazardous to life.”

In a similar study published last year, Peter Behroozi of the Space Telescope Science Institute (STScI) in Baltimore, Maryland, said: “Our main motivation was understanding the Earth’s place in the context of the rest of the universe. Compared to all the planets that will ever form in the universe, the Earth is actually quite early.”

Source: http://arxiv.org/abs/1606.08448

Image Credit: mrainbowwj.deviantart.com


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3 Comments

  1. From what I understand, the elements that life requires is created within a star and that star has to die(explode) for those elements to be released.
    How many star life cycles have passed since the big bang and before our solar system was formed?
    Id suspect not many since the known universe is less than 14 billion years old and a stars life span is measured in trillions of years.
    Unless there is another way for elements like carbon and metals to form apart from star internal fusion and then going supernova, then the earth is truly the first or among the first planets to host life.

    1. Only very low mass stars can survive for trillions of years. Massive stars burn fast and die young with extremely massive stars typically only surviving for millions of years. The first generation of stars were extremely massive and soon went supernova seeding the young universe with heavy elements. Even now, after 14 billion years, we still see an abundance of high mass stars which will go supernova after quite a short life, in stellar terms, so my view is that there has been sufficient time for the universe to be well infused with all of the elements required for life. Life is tenacious and will form wherever the conditions allow, in a universe so vast there must be innumerable stars around which there exists a ‘Goldilocks Zone’ in which reside planets suitable for life. I dont think it would be unreasonable to assume that life has had time to evolve on a good percentage of those planets.

  2. Most important words in that study “they believe”. Mere speculations, nothing else … and thank you, the aliens just had a good laugh 😉

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