Where do humans come from and what does the
future hold for humankind? These are two of the most intriguing questions in
science. In order to find answers to these questions, scientists have turned to ancient
fossils and tried to extract genetic information from them. Qiaomei Fu, a Professor
at the Institute of Vertebrate Paleontology and Paleoanthropology of the Chinese
Academy of Sciences, is a leading scientist in this field and has contributed
tremendously to exploring the genetic roots of humankind.
Fu co-developed nuclear DNA capture
technology, with Matthias Meyer from the Max Planck Institute for Evolutionary
Anthropology (MPI EVA), that successfully isolated 0.03% of human DNA from
bacterial DNA in an ancient human fossil found in a Tianyuan cave – a feat which
was previously considered "impossible". She was the first to sequence nuclear
DNA from an early modern human. Her work clarified the migration of early
modern humans into Asia. Furthermore, she aided in developing a new generation
of ancient DNA fragment extraction technology, which has been used to successfully
extract ancient DNA from non-frozen sedimentary layers dating back 400,000 years.
In comparison to earlier scientific research, this finding expanded the study
of ancient human genetic history by another 300,000 years.
You may wonder how studying the DNA of ancient
humans benefits us today. Mutations in our genomes can have complex histories
leading to their prevalence in human populations today. For instance, Type II
diabetes tends to occur more often in East Asians than in Europeans. This is
related to genetic mutations that have originated in Neanderthals. By studying the
genetic history of mutations associated with Type II diabetes in ancient humans,
scientists will have a better understanding of this disease.
Although we now have quite detailed genetic
information about modern humans in Europe, we have little information about
contemporary humans in Asia during the same time period. Fu’s work therefore fills an
important gap and is likely to yield fascinating and important insights into
human history.