1. Dolphins swim as fast speed boats. Pacific white Dolphins can swim at speeds around 28 km / hour.
2. Dolphins have to be conscious to breath.This means that they cannot go into a full deep sleep, because then they would suffocate. Dolphins have "solved" that by letting one half of their brain sleep at a time.
3. Millions of years ago, Dolphins had legs. Scientists see there are two pieces of the pelvis within the framework of a Dolphin. Maybe it was the former leg bone. Some scientists suspect Dolphin ancestors walked on land.
4. Several species of Dolphins have teeth more numerous and longer than a crocodile. There are species of Dolphins that have as many as 250 teeth. However, the Dolphins do not like to bite humans. When was the last time you heard of a Dolphin attack on the news?
5. Dolphins use echolocation to navigate and to find food. Dolphins send out clicks that are returned from other objects in the water (just like an echo). This way a Dolphin can locate food, other Dolphins, predators or rocks.
6. Dolphins often jump around fishing boats. They guide the fish into the nets of fishermen. In Brazil, bottlenose Dolphins alert when fishing nets are full of fish.
7. Dolphins communicate with the “whistle” and the “name” to identify one another. Some scientists suspect that Dolphins have a special call sign and use a special greeting when parting with his friend.
8. When an adult Dolphin is about to give birth, a Dolphin plays like a midwife, which helps with labor and to guard. After the baby Dolphin is born, the midwife helps care for it.
9. Dolphins and humans are the only mammals that have sex for pleasure.
10. Most species of Dolphins live in saltwater. However, there are several species of Dolphins that do not
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