When I was a teen, a thick highway of ants appeared on the kitchen floor. Back then, a poisonous syrup was sold called Antrol. We poured a line of this syrup across the highway. In the morning, we found that the ants had brought sand grains and piled them into the syrup until they had a bridge to walk across. Which ant had that idea, much less conveyed instructions to the rest?

Still earlier, I saw an article about a woman who had been rescued by a Japanese fishing boat in the open ocean. The crew spotted her on the surface, and supposed she was clinging to a floating drum or other object. When they came up to her, they could see that she was being buoyed by a large sea turtle. When she was safely aboard, the turtle disappeared.