Readers react to mysterious protists, bird brains, more

A storm brewing

Warming ocean waters due to human-caused climate change are spurring more hurricanes to rapidly intensify, Carolyn Gramling reported in “Why hurricanes intensify so swiftly” (SN: 10/7/23 & 10/21/23, p. 10).

The story made reader Barry Maletzky wonder why hurricanes take a spiral shape.