There was a scientist from France, named Jean Henri Fabre, who conducted an unusual experiment with some insects called processionary caterpillars. This experiment was an eye-opener for me. A processionary caterpillar will blindly follow the caterpillar right in front of it. That's why they're called "processionary"— they travel in a procession.
Fabre carefully arranged a group of fuzzy, grayish processionary caterpillars in a circle around the rim of a flowerpot so that the lead caterpillar touched the last one, making a complete circle. In the flowerpot he put a pine branch—the food of processionary caterpillars.
The caterpillars walked around the circular flowerpot rim. Around and around they went, hour after hour, day after day, night after night. They ate nothing. All the food they could want was close at hand and plainly visible, but they apparently didn't notice it, because they continued along the beaten flowerpot path.
