Short answers, pulled from the story.
The Atlantic Ocean is the second largest of the world's five oceanic divisions, with an area of about 85,133,000 square kilometers. It covers roughly 17 percent of Earth's surface and about 24 percent of its water surface area.
The name traces to Atlas, the Titan in Greek mythology who supported the heavens. The oldest known mentions of an Atlantic sea come from Stesichorus around the mid-sixth century BC and from Herodotus around 450 BC, referring to the sea beyond the pillars of Hercules.
The deepest point in the Atlantic Ocean is the Milwaukee Deep in the Puerto Rico Trench, reaching 8,376 meters. The ocean's average depth is 3,646 meters.
The Mid-Atlantic Ridge is a submarine mountain range that runs from 87 degrees North to the subantarctic Bouvet Island at 54 degrees South. Its exploration in the 1950s led to the general acceptance of seafloor spreading and plate tectonics.
From the 16th to the 19th centuries, the Atlantic was the center of the slave trade and the Columbian exchange. Between the 15th century and 1888, when Brazil ended the trade, an estimated 9.5 million enslaved Africans were shipped into the New World.
It is debated. Some theories suggest the Atlantic may begin to close through new subduction systems near Gibraltar, the Scotia Arc, and the Caribbean plate, while others propose it will keep widening as the Pacific Ocean closes first to form the supercontinent Amasia over the next 200 to 300 million years.