Questions tagged [xenobiology]

This tag identifies questions related to creating an alien biology that may be close to or far removed from Earthly biology, but still reflect what science knows about biology. This tag implies the use of the Science-Fiction tag. Use the Science-Based or Hard-science tags to impose greater scientific restrictions (see warning in tag wiki). The goal of this tag is to answer the question using what science humanity knows.

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Would it be biologically possible to have a species that use a photochromic material instead of an iris to control light intensity?

So in real life there is glasses that use photochromic lens to adapt to the light intensity Would it be biologically possible to have a species that use a photochromic material instead of an iris to ...
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Can a Biosphere Exist With Sulfur as an Oxidant?

I've been looking a lot at hydrothermal vents recently, because I was making a moon with a subsurface ocean that has life in it, and I found out that Sulfur can be used as an oxidant. My question is: ...
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Can a Pterosaur-style wing membrane attach directly to the exoskeleton?

art by ticklemecthulhu In my world of arthropod-like creatures (in that most of the creatures have an exoskeleton rather than an endoskeleton), I wished for a group of my aliens to convergely evolve ...