 The aliens, which are now called "Sirians", are bug-like creatures which look like giant cockroaches, but have a strong collective group mind using telepathic messages when in groups.At first the Sirians were tiny "roaches" on their home planet, but as time passed, they evolved and eventually took over the dominant race on the planet Siria, wiped them out, and assimilated their technology.Siria later became uninhabitable.