Serendipity, such as this case of prehistoric fossils being perfectly preserved in a frozen climate, met with modern technology, allows for previous records in scientific achievements to be surpassed. A 700,000 year-old ancestor to the modern horse has recently had its DNA fully recovered allowing for the oldest genome known to be fully sequenced. What do you make of the use of DNA of other specimens assumed to be related to the ancestor as references for completing the sequencing? What other limitations should be considered should prehistoric hominid DNA be recovered for sequencing? At what point, if any, could older traditional methods for mapping related organisms and their evolution become obsolete? Can genomic sequencing become the sole method for determining how organisms evolve and are related?