Dolphins 2

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overboard and was saved by a dolphin which carried him two hundred miles to shore. Obviously, dolphins and humans have been interacting together throughout recorded history.
According to the theory of evolution, it is most likely that the dolphin was once a land mammal. It is likely that sixty million years ago a cow, the distant cousin of the dolphin, decided to take his life to the sea. This is shown by the findings of hooves on dolphin fossils.
The appearance of dolphins has intrigued man�s interest in the physical makeup of these mammals. Dolphins are carried by their mothers for twelve months before they are born. Once they are born, they immediately swim to the surface for their first breath of air. At the time of their birth, dolphins are three feet long and weigh approximately thirty pounds. By adulthood, the dolphin will have grown to nine feet in length and will weigh over four-hundred pounds. The life expectancy of the dolphin is estimated at twenty-five years, ...

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dolphin has a well developed brain that weighs over three pounds; similar to the human brain which weighs close to three pounds. The dolphin�s brain accounts for one and a fourth percent of its total body weight. Since the dolphin needs air to live and must resurface every five minutes, it cannot completely fall asleep but instead has the ability to put half of its brain to sleep for resting purposes while the other half remains active.
Dolphins are a very social animal and depend on interaction with other dolphins. In the case of JoJo, a dolphin in the Bahamas who has developed a strong relationship with marine biologist Dean Bernelle, an interaction with humans to maintain a living ...

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