Human genome sequencing timeline (IMAGE) University of California - Santa Cruz Caption It took almost twice as long to finish the last 8% of the human genome as it did to sequence the first 92%. New laboratory and computational technologies finally enabled genomic researchers to overcome obstacles such as highly repetitive DNA sequences and fill in the remaining gaps. Credit NHGRI Usage Restrictions For use only with news coverage of this research License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.