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

2) The human brain has a storage capacity equivalent to around 2.5 petabytes, which is roughly equivalent to three million hours of TV shows.

3) The blue whale is the largest animal to have ever existed, with an average length of about 82 feet (25 meters).

4) The word "mountain" contains three vowels: O, U, and A.