1) The ocean covers about 71% of the Earth's surface and contains roughly 97% of the planet's water.

2) Cows have best friends and can become stressed if they are separated.

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

4) Robert Downey Jr. is an American actor known for his portrayal of Iron Man in the Marvel Cinematic Universe. He has also starred in films such as "Sherlock Holmes," "Chaplin," and "Tropic Thunder," and has received critical acclaim and commercial success for his performances.