What is the history of undersea exploration?

120 years ago, people firmly believed that there could be no living things in the deep sea. However, during its voyage around the world (1872-1876), the British Empire battleship "Challenger" discovered that the environment in the sea was much more stable than on the ground, and there were living things at any depth.

But there is no sunlight, no plants, and very limited food in the deep sea. Not many creatures can survive in a certain area.

The legend of the Dragon Palace and the legend of King Alexander's diving all show that exploring the seabed has been a dream of mankind since ancient times.

The first person to realize this dream was American William Bibb. In 1930, he rode an iron ball embedded with observation holes and sank to the seabed 900 meters deep on iron chains, leaving behind precious observational data.

The evolution of methods for exploring the seabed

The manned submarine that can sail freely was designed and manufactured by Professor Auguste Piccard of Switzerland. Submarines using gasoline as buoyant objects have developed from the early "Algimedes" to the "Dreeste", and in 1960 they successfully dived to a depth of 10,900 meters in the Mariana Trench, the world's deepest. .

Since then a large number of submarines have been built around the world. Among them, representatives of high-performance scientific research submarines include: the American "Alpine" and "Seacliff", the French "Chiana" and "Noger", and Japan's "Deep Sea 2000" and "Deepsea 6500."

Like this, current human technology allows people to directly enter the seabed at a depth of more than 6,000 meters. Now people can directly explore more than 97% of the underwater world.

Unmanned high-tech intelligent submarines have now been developed and manufactured, which can conduct detection and research work in dangerous places for a long time.

Some people may still remember that Japan's "Haikou" unmanned submarine, the world's highest performance, once dived into the Mariana Trench - a challenging trench for submarine surveys.

In addition to submarines, people also use trawl nets, dredgers, and cameras to observe the sea. The biggest advantage of conducting research from images is that the movement of the earth and the interaction between the environment and organisms can be observed at the same time.