How likely would beings from other planets be any where near our size?  They could be 1 mm tall or 100 ft tall.  What is the probability?

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  • 3 weeks ago

    83.5% probability.

    We humans have insufficient data to answer your question, sorry about that.

  • 3 weeks ago

    Well... a couple of things. 

    You need a minimum brain size - and, perhaps unfortunately, Man's brain is probably just about the minimum.  So, you'd need a body and cranium large enough to support it. At the same time, creatures 100 feet tall require a LOT of food and low gravity to keep them able to move & fed... So, a large population would rather quickly experience food shortages on a planet our size - and larger planets would generally have higher gravities... 

    So... A little less than our size, to maybe double or triple our size would be about the range, although - it's a big universe... so there may be large exceptions out there.

  • 3 weeks ago

    If you're thinking of intelligent, tool-using life there are limits on size although the number of bodies involved might vary. For instance, a telepathic ant colony or a flock of birds could be intelligent but have small individual brain units joined together in a larger quantity. But they could easily be larger, although this would make it more difficult for them to leave a home world. If they were already in space though, this wouldn't make much difference.

  • It depends on gravity, planet and its resource quota.

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  • Anonymous
    3 weeks ago

    If you believe in convergent evolution, and if they came from a similar-ish planet to ours, I'd expect an intelligent alien to be within a range of say 10 times smaller to 10 times larger than us.

  • 3 weeks ago

    It would depend on the gravitational force where their home is

    It has been surmised that a creature that lived on a Proton Star would have difficultly growing over 1 mm tall

    The said creatures given the name Cheelas

    If Humans Colonised Mars and obviously began breeding

     Their children would gradually become taller

     But back on Earth they may finding walking dificult

    Attachment image
    Source(s): Cheela Sketches
  • 3 weeks ago

    Since they don't seem to exist, the probability is zero.

  • 3 weeks ago

    It depends on the force of gravity on their (ficticious) home planet.

    • Zardoz
      Lv 7
      3 weeks agoReport

      Or the density of their atmosphere. Whales have the same gravity we do. Actually, slightly higher being at a lower elevation.

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