Follow me, I'll follow you !

We often hear that if a sheep jumps off a cliff, he will take his entire flock with him, hence the term "follow like sheep". Are sheeps stupid? Researchers have studied the phenomenon, and this group effect is more rational than you think. Sheeps, torn between their desire to find food and to be protected from predators, regroup to explore more effectively blank spaces and circulate information more quickly in case of danger.