For more than a decade, Cynthia Kenyon has watched microscopic worms of the species Caenorhabditis elegans live far longer than they should. She has seen mutant strains of this worm, which is normally dead and gone after a mere 2 or 3 weeks, last well into their second month.
Log in
Subscribers, enter your e-mail address for full access to the Science News archives and digital editions.