How Stentor coeruleus is challenging established textbooks

At a Harvard University laboratory, a small yet intellectually momentous drama is unfolding. An unremarkable single-celled organism is challenging established textbooks. Learning was supposedly the preserve of animals with nervous systems, but that boundary is now beginning to crumble-thanks to an organism scarcely larger than a speck of dust.

A “water trumpeter” that anticipates danger

The study’s star is called Stentor coeruleus.