Tallisite

Tallisites (Homo sapiens tallis) are a humanoid species native to the planet Tallis in the Sundom of Eris. Compared to other sapient species, Tallisites have limited genetic diversity and commonly appear with pale skin, dark brown to black hair, and on average grow to anywhere between 150 to 200cm tall.

Tallisites are genetically nearly identical to a now extinct species known as Humans (H. sapiens terra) that were native to the planets Sol III and IV (also known as Earth and Mars respectively).

Archaeological and genetic evidence strongly suggests that Tallisite life originated from Precursor Comet PC-3, which deposited essential biological materials including ice, carbon compounds, and proto-cyanobacteria on what would become Tallis.

It's commonly accepted the same comet is believed to have continued its trajectory to the Sol system, explaining the genetic similarities between the two species, but critics point out the extreme statistical unlikeliness of this occurrence.

Tallisites have characteristically pale skin that contains minimal melanin, an evolutionary response to the reduced UV radiation from their home star, Eris. This adaptation, while beneficial on Tallis, renders them particularly susceptible to UV damage on other worlds.

Their hair colouration exhibits a notable geographical distribution pattern, with darker shades predominating in areas of higher light exposure and lighter variants occurring near the Tallis date line.

The species' cellular composition closely mirrors that of their Human ancestors, comprising approximately 30 trillion cells and 38 trillion symbiotic bacteria at maturity.

Their biochemistry is primarily based on common organic elements including hydrogen, oxygen, carbon, calcium, and phosphorus, arranged in complex cellular and non-cellular structures sustained by an extracellular matrix.

While the majority of Tallisites remain on their homeworld, significant expatriate communities have established themselves within the Navareo Empire and the Galactic Neutral Zone (GNZ). Recent genetic studies have shown successful integration of Navarean melanin operons into the Tallisite genome through targeted gene therapy, enabling some individuals to develop enhanced UV resistance.