Key Ingredient for life is STARS - The smaller, the longer lasting, the better for evolution - So we're actually early to the Universe - The Aliens come later. Much much later.

  • Posted by a hidden member.
    Log in to view his profile

    Aug 05, 2016 9:27 PM GMT
    Oh noooos. We've arrived to the party billions of years too early lol.....

    You are a fluke of the universe. You have no right to be here.


    http://arxiv.org/pdf/1606.08448v2.pdfRelative Likelihood for Life as a Function of Cosmic Time

    Abstract. Is life most likely to emerge at the present cosmic time near a star like the Sun? We address this question by calculating the relative formation probability per unit time of habitable Earth-like planets within a xed comoving volume of the Universe, dP(t)/dt, starting from the rst stars and continuing to the distant cosmic future. We conservatively restrict our attention to the context of “life as we know it” and the standard cosmological model, ΛCDM. We nd that unless habitability around low mass stars is suppressed, life is mostlikelytoexistnear∼0.1M stars ten trillion years from now. Spectroscopic searchesfor biosignatures in the atmospheres of transiting Earth-mass planets around low mass stars will determine whether present-day life is indeed premature or typical from a cosmic perspective.

    26ae15fb26e6b3c97dcd7020b4bf9e09.jpg
  • Posted by a hidden member.
    Log in to view his profile

    Aug 05, 2016 9:39 PM GMT
    http://phys.org/news/2016-08-earthly-life-premature-cosmic-perspective.htmlIs Earthly life premature from a cosmic perspective?

    The universe is 13.8 billion years old, while our planet formed just 4.5 billion years ago. Some scientists think this time gap means that life on other planets could be billions of years older than ours. However, new theoretical work suggests that present-day life is actually premature from a cosmic perspective

    ...Life as we know it first became possible about 30 million years after the Big Bang, when the first stars seeded the cosmos with the necessary elements like carbon and oxygen. Life will end 10 trillion years from now when the last stars fade away and die. Loeb and his colleagues considered the relative likelihood of life between those two boundaries.

    The dominant factor proved to be the lifetimes of stars. The higher a star's mass, the shorter its lifetime. Stars larger than about three times the sun's mass will expire before life has a chance to evolve.

    Conversely, the smallest stars weigh less than 10 percent as much as the Sun. They will glow for 10 trillion years, giving life ample time to emerge on any planets they host. As a result, the probability of life grows over time. In fact, chances of life are 1000 times higher in the distant future than now.

    "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.