According to studies, dolphins are the second most intelligent species on earth, right after humans.

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Scientists have been amazed to find that dolphins have a high brain level, not only in intelligence, but in emotion as well. Research has shown that, just like humans, dolphins experience emotions such as joy, sorrow, happiness, and suffering, and just like humans, these are caused by experiences.

Dolphins have similar abilities to humans such as being able to recognize certain things such as objects, patterns, and even themselves in mirrors, things we thought only we could do. Dolphins communicate to other dolphins similar to how humans interact.

Studies of emotional levels have shown that dolphins have had heart attacks due to stress. This shows the capacities of dolphins, and how intelligent they truly are.

The only times we usually see dolphins are during shows at aquarium parks or other recreational sights.

Often, we see them do amazing shows for us, with trainers guiding them. Of course, all of this is for our entertainment.

What many don't realize is that although some are kept in these parks due to injuries and loss of natural ability, many are healthy to go back into the wild, but are kept because they are intelligent animals that understand the commands of their trainers.

Researchers have found that many dolphins are natural at the what they do, because they are playful in the wild too. Being held in these captive environments doesn't help them when it comes to both their physical and emotional stress. A top neuroscientist at Emory University, Lori Marino, has studied the behaviors of dolphins closely and says that, if they are healthy, it is better for their mental state to be be freed, because all the tricks they do in an aquarium they do out in the wild, without the stress and commands of others.