In a newly published book aimed at demystifying genetics, South African based Dr Nonhlanhla Khumalo speaks directly to teenagers in "Genes for Teens".
A Cornell study of genome sequences in African-Americans, European-Americans and Chinese suggests that natural selection has caused as much as 10 percent of the human genome to change in some populations in the last 15,000 to 100,000 years, when people began migrating from Africa.
Humans and their oral bacteria evolved from a common African ancestor A New York University College of Dentistry (NYUCD) research team has found the first oral bacterial evidence supporting the dispersal of modern Homo sapiens out of Africa to Asia.
When humans made their way out of Africa some 60,000 years ago to populate the world, they were not alone: They was accompanied by the bacterium Helicobacter pylori, which causes gastritis in many people today.
Melanie Gosling A prehistoric human skull from the Eastern Cape has provided a vital "missing link" in the fossil record which shows that modern people originally came from sub-Saharan Africa and migrated to colonise Europe and Asia around 30 000 to 40 000 years ago. The 36 000-year-old Hofmeyr skull, named after the Karoo town where it was found, shows that people living in Africa at that time looked the same as people living in Europe then.
An international team of scientists, assisted by Cameroonian officials, and led by researchers at the University of Alabama at Birmingham (UAB), has discovered a crucial missing link in the search for the origin of HIV-1, the virus responsible for human AIDS. That missing link is the natural reservoir of the virus, which the team has found in wild-living chimpanzees in southern Cameroon.