The following Paragràph has not be edited. There is one correction . Correct and re-write:

• Dolphins are small-toothed whales. Any people think 
• that those slim and smotth-skinned mammals are
• as we are. Since an ancient times, there has
• been the special friendship between humans 
• and this playful animals. Moreover, there are
• much stories of dolphins saving the drowning sailors.
• Baby dolphins often stay with our mothers for many years.