1) The word "island" contains two vowels: I and A.

2) The oldest known musical instrument is a flute made from a bird bone, estimated to be around 43,000 years old.

3) A newborn kangaroo is about 1 inch (2.5 centimeters) long and weighs less than a gram.

4) The ancient city of Rome was founded in 753 BC and went on to become one of the most powerful and influential civilizations in history.