Kernicterus is caused by a high level of bilirubin in a baby's blood. If left untreated, the bilirubin can then spread into the brain, where it causes long-term damage. A low-level buildup of bilirubin is normal.
View full size image. Compared with modern Homo sapiens, which have only been around for the last 200,000 years, Homo erectus, or upright man, had a long reign. The ancient ancestor of modern humans lived from 2 million years ago till about 100,000 years ago, possibly even 50,000 years ago.omo erectus, an ancestor to modern humans, arose at least 1.8 million years ago. Around that time in the fossil record, archaeologists see big shifts in brain size and body size in ancient hominins.
However, not all early Homo erectus leaving Africa had Acheulian tools. Apparently, some only had the older Oldowan tradition. Acheulian tool making reached Europe by at least 500,000 years ago and possibly as early as 900,000 years ago.