• TheGrandNagus@lemmy.world
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    1 year ago

    there is a reason why such giant creatures don’t exist anymore.

    Such giant creatures do exist. Larger ones even.

    By far the most robust theory for the mass extinction event that wiped dinosaurs out is the asteroid theory. Not there being a sudden extreme change in oxygen levels lol.

    • trashgirlfriend@lemmy.world
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      1 year ago

      I think people get confused because afaik the reason today’s bugs may be smaller due to the lower oxygen levels.

      Doesn’t really apply to T-Rex tho.

      • Ageroth@reddthat.com
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        1 year ago

        Which has to do with how bugs breath through their exoskeletons which is a function of surface area. Lots of O2 can support larger surfaces area bugs.