AI Insight
Foraminifera, abundant marine plankton found in all oceans, have periodically switched the direction of their spiral shells synchronously across the globe over thousands to millions of years. These directional changes occur suddenly and simultaneously worldwide, then reverse again after extended periods. The phenomenon represents a striking pattern in the fossil record of these single-celled eukaryotic organisms.
Why it matters
Understanding why these microorganisms change their shell spiral direction in coordinated global patterns could provide insights into environmental triggers affecting marine life across vast distances and timescales. The fossil record of foraminifera serves as an important tool for studying past climate conditions and ocean changes.
Understand the Science
For thousands and sometimes millions of years, marine plankton all over the world built their spiral shells in one direction. Then, suddenly, the spirals switched direction at the same time, everywhere, only to switch back again later. These microorganisms are types of foraminifera, or forams. Found in all oceans, from the tropics to high latitudes, they’re among the most abundant eukaryotic…
Source: Why Do These Fossil Shells Flip Their Spirals Every Few Millennia?