The Greenland shark, despite its uncharismatic appearance, can live up to 400 years. An international team of scientists has mapped its genome, revealing insights into its longevity. The research, led by Steve Hoffmann, found the shark has a large genome with about 6.5 billion DNA base pairs, the largest of any sequenced shark. This genome includes duplicated genes involved in DNA repair, which may contribute to its long lifespan. The findings, published in bioRxiv, offer a comprehensive look at the shark’s genetic makeup.