#奥秘 #
From the outside, the dolphin has no ears, but the sound can travel from the water layer to soft tissues and bones, and then into the inner ear. The maximum can reach 280 kHz, while the human sense of hearing does not exceed 20 kHz. Its eyesight is amazing, and it can see not only what is in the water, but also what is in the air. There was an experiment in a dolphinarium that blindfolded it with a rubber suction cup, and it was able to quickly find the vitamin gel pills that people threw into the water. It is not by its sight and hearing, but by its natural sonar, the echo locator.
Dolphins are trained to assist marine scientists in doing a lot of work, helping divers to transport things, salvage items, and can also be used in the military, and can also act as "hunting dogs" to drive fish into the net.
After receiving training in acoustic signal commands, dolphins can jump out of the water according to the command, catch the ball with their fins, and do many funny tricks.
What is even more amazing is that dolphins that have been living in the ocean without training have the spirit of "helping others". Once, 11-year-old Nika Krisgis, an Australian, was swimming in the sea with a friend, and a strong wind overturned the small wooden boat, and Nika was swept away by the waves, a big dolphin. Immediately swam towards him against the wind and waves, so that several sharks did not dare to come near him. In the end, Nika was rescued. In early 1988, three men on the east coast of South Africa were shipwrecked in a storm and landed in the sea, where fish sharks were in stock and their lives were at stake. At this time, ten dolphins swam in, surrounded them, and repelled the sharks. The clever dolphins also guided them to the shore safely.
Dolphins are humane, but some scientists engaged in marine life research have other explanations. According to their experiments, dolphins love to surf toward the waves stirred up by large boats, and it is precisely because of this love that dolphins save people.
At the same time, dolphins and sharks are rivals, and when they meet together, they often fight until the shark is driven away or the shark is killed.
Warm Message:
If you have a good mentality, your popularity is good, because you know how to be tolerant. Good mentality, do things smoothly, because it is informal; good mentality, happy life, because you know how to let go. Don't let the temper be as big as the skill, the more capable people are, the less tempered they are. People with a good mentality are harmonious and perfect everywhere. A good mindset can inspire your maximum potential.