In search for resources, new species, and researches, exploration of the seas and other bodies of water on earth is being done. However, some parts of the sea are generally hard to reach because of the depth and the risk to be taken.
Sea bed explorations have been a long journey and trials up to date. Currently, a small percentage of the sea bed that is already explored and monitored though there are high-tech gadgets available. The pioneer for deep sea explorations are the Europeans. Historically, their goal is for conquering places and gaining power. During their exploration, they tried examining the sea bed using a hallowed metal attached into a long line to get some sample of sediments that can be found underneath. However, they are getting anyway farther because of limited resources. Ferdinand Magellan, a popular Spanish explorer tried measuring a particular sea floor but was not able to do it. He was just able to prove that the ocean is far deeper than 2,400 ft. French scientist Pierre Laplace was able to approximately measure the average depth of Atlantic Ocean to be 13,000 ft based on tidal motions.
Deep sea explorations actually began on the mid 19th century when advancement in technology arose. British government launched their first exploration that led them to the discovery of new marine species. After this, several expeditions have been set by different countries (which include the USA) in order to do extensive searching. In 1960, Walsh and Piccard was the first person to reach the lowest point on earth, or the Mariana Trench.
At present, a large percent of the sea are yet to be discovered (about 90-95% undiscovered). This exploration of the sea will create more rooms for research and development in the future of humanity.