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Dolphins evolved from wolf like
animals about the size of a dog 50 million years ago. |
| When a dolphin sleeps,
only half of the brain rests. To allow the dolphin to function
normally, the other half stays awake. Then they switch. |
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Bottlenosed dolphins are
studied the most by scientist because they like to live inshore.
They like to be stroked on the side or belly, not on forehead. You
may be lucky to touch one! |
| Dolphins can communicate
through barks, groans, chirps, and whistles. |
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Some types of dolphins
swim in herds of hundreds and thousands. |
| Most live just over ten
years. |
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Older females may have a
spot on their back. |
| Even though dolphins
live in the water, they breathe air through blowholes. |
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