The age of speciation of H. garbagiens out of ancestral H. sapiens is estimated to have been roughly 31 years ago.
Until the year 1988, in taxonomy, Homo sapiens were the only extant human species. The name Homo garbagiens, latin for “Trash People”, was introduced in 1988 by Borge Trashman (who is himself also the type specimen). The term anatomically trashy humans (ATH) is used to distinguish H. garbagiens having an anatomy consistent with the range of phenotypes seen in contemporary humans who inhabit The Great Pacific Garbage Patch.
Following the peopling of Earth some 130,000 years ago, and the recent Into-the Pacific expansion some 100 to 200 years ago, some sub-populations of H. garbagiens have been essentially isolated for decades thriving off the man made mass known as The Great Pacific Garbage Patch. Combined with contemporary admixture this has resulted in significant genetic variation.
Some climatic adaptations, such as toxic-gas adaptation in Trash People, are thought to have been acquired by contemporary admixture.
Physiological or phenotypic changes have been traced to Upper Trashiolithic mutations, such as the East Pacific variant of the WASTE gene, dated to 50 years ago. Recent divergence of H. lineages was sped up significantly during the Last Global Trash Dump, due to increased Garbage Patch size and due to population effects associated with migration. Alleles predictive of human skin have been found in Homo garbagiens, but the alleles for skin associated with WASTE and GROSS, are (as of 2012) thought to have not been acquired by contemporary admixture but by recent mutations since the Into-the-Pacific expansion.
Average cranial capacity in modern Trash People populations varies in the range of 100 to 130 cm3. Larger cranial volume is associated with the Western and Central Garbage Patch regions, the largest averages being found in populations of the Western Plastics region and the Central Radioactive region.