In late 1980,s, the Genetics scientists in the year 1984 recovered 229 base pair of genetic code from a quagga, a subspecies,s of Zebra, which is almost an extinct animal.

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This achievement proved that DNA could survive in dead things and spurred a new field of science called Palaeogenetics.

Now day advance technology allows scientists to read billions of letters from the genomes of ancient human’s and other organisms transforming our view of the history and evolution.
Johannes Krause says, (director of archaeogenetics at the Max Planck Institute for the Science of Human History in Jena, Germany) that, ”.The genetic record is “like a lost library … and we’re just starting to learn the language of all those books that we have to uncover”.

According to anthropologists, Ancient human DNA (aDNA) provides insights that could not be gleaned from fossils or artifacts.  It’s already discussed in some major debates, including whether modern humans interacted with Neanderthals. Ancient genomes show definitively that our ancestors not only met but mated with Neanderthals — multiple times — between 40,000 and 100,000 years ago.

Referred from:Discover magazine