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

2) The concept of self-driving cars, or autonomous vehicles, is being actively developed by companies such as Tesla, Google (Waymo), and Uber.

3) Cricket, originating in England, is a popular sport played in many countries and is known for its distinctive rules and terminology.

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