There is little left from those initial settlements but tales; tales of stubborn colonists who refused to leave and still live a nomadic lifestyle in the desert wastes. This seems unlikely, as there are no known sources of water in the desert realms. Additionally, thermal protection is a necessity due to the fact that during the hottest part of the day, temperatures can cause water to reach its boiling point in a matter of minutes; for most lifeforms the desert wastes would be unbearable. Recent explorers, however, have reported finding footprints in the desert sands which they have said are clearly humanoid. As the local fauna is not fully characterized, the prints could be attributed to some unknown species, but the legend of ancient sentient beings living in the wastes persists.
Given the distant location of this planet and its changing conditions, it's understandable that the initial colonization attempts failed. It is, however, the life-friendliest planet in the Alebreen system, as most of the other planets have toxic atmospheres.