# 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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• 2 months ago

83.5% probability.

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

• 2 months 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.

• 2 months 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.

• 2 months ago

It depends on gravity, planet and its resource quota.

• Anonymous
2 months 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.

• 2 months 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

Source(s): Cheela Sketches
• 2 months ago

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