1) The word "banana" contains three vowels: A, A, and A.

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

3) International relations encompass the study of relationships between nations, including diplomacy, treaties, and foreign policy. It examines the interactions and dynamics among different countries in the global arena.

4) The world's longest traffic jam occurred in China in 2010 and lasted for 12 days, stretching over 60 miles (97 km).