Wed, 05 May 2021 18:26 UTC © Pavel_Klimenko/ShutterstockMany things separate the kingdoms of animal and plant. One of them, we might suppose, is pain. Humans — along with all other nerve-endowed organisms — experience damage to their bodies as subjectively unpleasant. Plants are just as prone to injury, of course, and they respond to injury in their own way. But we feel the stabs and aches in a way they presumably don't. Lacking the brain and nervous system needed to conjure consciousness (not to mention nociceptors, the animalian cells that react to painful stimuli), our vegetal cousins...