Molly’s Myths: Top 10 Alien Types - Part 1 Greys: One of the most commonly depicted types of aliens, Greys are typically described as having a small, thin build, large black eyes, and grayish skin. They are often portrayed as being highly advanced and capable of telepathy. Reptilians: These aliens are said to have a humanoid appearance with scaly skin, sharp teeth, and slit-like pupils. They are often depicted as being aggressive and manipulative, with some conspiracy theories suggesting that th