<iframe width="560" height="315" src="https://www.youtube.com/embed/476Vm56t1GM" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe> <br> Which is smarter, a dolphin or an octopus? It's a harder question than you might think. Research has shown that octopi are actually incredibly smart animals with a very complex understanding of space, shapes, memory, and have an extremely complex visual communication system. In other deep thoughts, Joe wonders about who was the first person to commit suicide. Is it possible that in prehistory days when everything was about survival, one rebel decided to end it all? Was there a point where we became smart enough to be depressed?