The Mystery of Octopus Intelligence

Unlike other animals, octopi use a variety of strategies to solve the same problem. They can use their eight powerful arms to open clams, or they can drill through the shell and inject a fast-acting poison. In the laboratory, octopi kept in isolation were given a floating plastic bottle. The bored octopuses quickly devised a variety of games to play with the bottle - a sure sign of intelligence. Photo: Pixabay.com (PD)