Silurians (Earth-7500)

The Silurians (Homo Reptilia) were a race of humanoids living on Earth. They already started evolving during the Silurian period, way earlier than the Humans did. They are still closely related to Humans, however.

Unlike the Humans, the Silurians don't live on the surface of Earth. When they were only just evolved, the Earth had still many disasters (some known as mass extinctions). The Silurians decided to live underground instead. They only started noticing the Humans during the 20th century, though, and they have tried several times to reclame the Earth; but they have never succeeded in doing so.