I'm not disagreeing, but how else would we be able to observe behavior like this? Approaching dolphins in the wild, at least in America, is dangerous for the dolphins and illegal. Not to mention, if we WERE lucky enough to observe a dolphin doing this, what is the chance we'd be able to get evidence? Not every scientific diver brings a camera and has it ready at the right times, it's very unlikely. We've done myriads of studies that have allowed us to realize just how intelligent they are, and that's something we'd have never known or could have tested in the wild. It's a F***ing disgrace that they're kept in poor conditions and poor health. But zoos are a chance to let the average joe observe something they likely would have never seen, and thus understand and appreciate it. It's a flawed system, but those captive animals are there to help everyone understand and appreciate their wild counterparts.
Sleeping at the wheel
Horses slide down hill
Skateboarder jumps into pool
Guy jumps from cliff into slide
Getting in place
Girl drops phone under moving sports car
Falling tree branch almost hits man
Dog chasing ball in skate park vs. momentum
Kid throws rock into lake
Winston Churchill torpedoes German destroyer