This Week in Science (May 8 – 15)

May 15, 2016

You want to have a reference point of where to find the best recent scientific and technological breakthroughs? Here they are, in the weekly science compilations. Share them with friends and family, online or in real life. Enjoy!

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2 comments on “This Week in Science (May 8 – 15)

  • @link – Earth’s Ancient Atmosphere Was Half As Thick As It Is Today

    A high rate of removal, implying substantial biological fixation, without the balancing return would do. Last year, Buick published evidence that biological nitrogen fixation was already well established half a billion years before these Pilbara basalts erupted. He and Catling say that in the absence of oxygen, the return mechanism was weakened, so that for hundreds of millions of years, life steadily transformed the atmosphere by removing nitrogen.

    If there was life actively removing nitrogen and this reduced the surface pressure, there would still be liquid water of various temperatures under pressure at hydrothermal vents regardless of surface temperatures! Life could persist in such places regardless of effects elsewhere. Local and global Earth temperatures, are in any case variable, according to latitude, axial tilt and ellipticity of orbit.
    Planetary orbits can also migrate nearer to, or further from, their stars, as result of resonance, impacts, or conservation of momentum.

    There could be many variables involved.



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