Over the last few hundred years, more and more fossils have been added to the world's fossil collection, fossils from all over the world. New theories have been created and old theories have been almost proven about the evolution of man. For example, we have evidence that there have been different human species with certain types of DNA sequences and instincts, some that we may no longer have, or others that other species didn't have then. Although it is the subject of much debate, one of the most widely accepted theories is that Homo sapiens interbred with the slightly more primitive human species, the Neanderthals. It all started when the first Neanderthal fossil to receive much attention was found in 1856 in Dusseldorf, Germany, as it was the entire being, rather than a few scattered bones (Walter, 102). Shortly thereafter, another skull was found in Maba, China, which had the same similarities to Neanderthals. However, not much archaeological work has been done in the Far East. Aiello, an archaeologist, says: "[He has] no doubt that Neanderthals could have migrated further east, to Mongolia or China... There would have been nothing to stop them." Neanderthals took advantage of a warm period 125,000 years ago during migration. Eventually they made it all the way to Siberia. During that warm period, 125,000 years ago, the size of the Caspian Sea shrank dramatically (Than, 1). Remains of cave drawings of Neolithic peoples and human-shaped figures have been discovered that date back approximately 41,000 years (Hammer, 66). Chinese and Malaysian Homo Sapiens have characteristics very similar to Neanderthals. Analysis of the skull of Neanderthals and Homo sapiens is generally considered more accurate if the entire skull is examined, rather than a certain…half of the paper…an dated shape” (IBT, 1). To understand things like this and prove it, regions of genomes are compared to entire genomes. Before we can judge the pattern of human origins, we must be able to understand the coding of genes for human traits, etc. Paabo's team discovered an mtDNA sequence from a finger bone found around 40,000 years ago, as carbon dating is one of the most commonly used methods to determine the age of a fossil. (Hammer, 70). Furthermore, the mtDNA of Neanderthals differs markedly from the mtDNA of modern humans. For example, microcephalin is a gene that determines the size of the brain during the development of the organism. The size of the modern human brain is significantly smaller than that of Neanderthals, as are their brain cavities. TAS2R38 is the gene that controls taste. For Neanderthals, having a bitter-tasting “system” might have prevented them from accidentally poisoning themselves.