Why Atlantic & Pacific Oceans Meet, But Don't Mix

Back in high school, we were taught that about 70 percent of the Earth's surface is covered with water, 361,132,000 square kilometers, to be precise. This is easily identifiable when you look at the map of the world as the deep blue regions clearly depict the five vast oceans of the world.
Although it seems logical, you would be mistaken to think that all five oceans of the world flow into one another, forming one unified water body. In fact, despite being made entirely of the same components, H20, water bodies do not always mix. A prime example of this is the Pacific Ocean and the Atlantic ocean.
The Atlantic and Pacific oceans are the two largest oceans in the world. Together, they cover half of the entire Earth's surface. But at the point where these two meet, the southernmost tip of the end of South America called the Cape Horn, a very strange phenomenon occurs. The waters of the Atlantic and Pacific oceans refuse to mix.