Textbooks challenged by new discovery about how cells divide
Science Daily
February 28, 2026
Scientists have uncovered a surprising new way that giant embryonic cells divide—without relying on the classic “purse-string” ring long thought essential for splitting a cell in two. Studying zebrafish embryos, researchers found that instead of forming a fully closed contractile ring, cells use a clever “mechanical ratchet” system.
Verticals
scienceresearch
Originally published on Science Daily on 2/28/2026