Aliens. What they actually may look like.

Alien appearances would adapt to their planets’ conditions. High gravity could lead to compact, muscular builds, while low gravity might result in slender, elongated forms. Intense sunlight might produce thick, reflective skin for radiation protection, while dim light could result in pale, translucent skin. Atmospheres rich in oxygen or methane could drive unique skin colors and breathing adaptations, creating beings as varied as their environments.