June 27, 2021
OTIFERS ARE MICROSCOPIC freshwater-dwelling multicellular organisms. They’re already known to withstand freezing (even in liquid nitrogen), boiling, desiccation, and radiation, and the group has persisted for millions of years without having sex. The humble yet remarkably hardy bdelloid rotifer has now surprised researchers yet again—a recent study unearthed 24,000-year-old Siberian permafrost and found living (or at least revivable) rotifers there. Surviving 24,000 years in a deep freeze is a new record for the species.