But altering them both simultaneously produced a 500 percent increase in lifespan — the human equivalent of living for 400 - 500 years.
"The synergistic extension is really wild," co-lead author Jared Rollins said. "The effect isn't one plus one equals two, it's one plus one equals five."
Another creature commonly studied in anti-aging research is Turritopsis dohrnii, also known as the immortal jellyfish. When sick, old or hurt, the unique jellyfish can "rebirth" itself back into an earlier stage — which in theory it can do indefinitely — rendering it biologically immortal.