The Deepest Dive

In 1872, two scientists set out to study the ocean. They sailed the seas on a ship called the , collecting animals and testing the waters. Wherever they stopped, they measured the depth by lowering a weighted line until it hit the bottom. In one place off the coast of Japan, the line just went down and down. It was the deepest place ever found. They called it the Mariana Trench. Many years later, another ship, also named , found the deepest