Just your average urban druid interested in technology and quantum field theory.

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Joined 1 year ago
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Cake day: June 13th, 2023

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  • There’s growing speculation that 13.767 billions years may be the earliest that the universe can support life, due to events like this. The universe had to expand, a lot, to get to a place where life had a chance to evolve, and not get obliterated by these types of events.

    Plus our galaxy may be in a void. A really big one at that:

    In 2013 Barger and two colleagues, Ryan Keenan (then at the Academia Sinica Institute of Astronomy and Astrophysics, Taiwan) and Lennox Cowie (University of Hawai‘i) counted some 35,000 galaxies from multiple surveys. What they found is that the Milky Way appears to live in a relatively empty area. Per unit volume, there’s half again as much light reaching us from galaxies 1.5 billion light-years away as there is from galaxies right around us.

    It’s as if we’re living in the suburbs, and the skyglow we see in our backyard comes more from distant cities than from our neighbors.

    If this sparse region that we live in is a true cosmic void, then at 1.5 billion light-years in radius, it’s well above average in size, says Hoscheit. Typical voids have radii between 90 million light-years and 450 million light-years, he says. But this void would be so big, it would encompass the Laniakea Supercluster, which the Milky Way and its Local Group of galaxies call home, as well as the Tully Local Void, which Laniakea borders. “It would be the largest void known to science,” he says.

    From: https://skyandtelescope.org/astronomy-news/does-milky-way-live-cosmic-void/

    So the fact that our black hole (Sagittarius A*) hasn’t done this, and that we’re far away from other black holes that have done this, just might be why you’re reading this reply.

    Let’s toast to our existence in the backwaters of our galaxy and the KBC void! 🥂


  • I wish people would realize that terraforming is the only way we’re going to colonize other planets.

    Sci-fi showed us landing on Earth-like planets and making a new home. Reality will show us dying in a completely alien biosphere as bacteria and viruses we have zero resistance against ravages our bodies the moment we’re exposed to it. And we’d expose the new biosphere to pathogens it has zero resistance to.

    We might be able to adapt by living in a protected environment (i.e. our biosphere) and slowly exposing generations of our descendants to the new biosphere. But many, many of us would die in the process. Not to mention genetic mutations.










  • Interesting report. Two concerning bits though:

    No attempt was made to distinguish between vitamin D2 and D3 because there was not always a distinction in the literature. However, vitamin D2 is less effective at raising serum 25(OH)D concentrations than is vitamin D3 (13).

    And that the group sizes (“n” values) top out in just one at 1653. The rest are usually under 20.

    Which doesn’t matter in the slightest as my post was to simply make the OP aware that too much can be harmful.

    Your post simply raises the bar on how much is too much, but doesn’t change the underlying point I was trying to make.

    Thank you for posting that report!