1) The Atlantic Ocean is the second-largest ocean and is known for its strong ocean currents, including the Gulf Stream.

2) The deepest part of the ocean is the Mariana Trench, reaching a depth of about 36,070 feet (10,994 meters).

3) The tongue of a blue whale is so big that about 50 people could stand on it.

4) The smallest unit of time is known as a zeptosecond, which is equal to one trillionth of one billionth of a second.