1) Priyanka Chopra Jonas is an Indian actress, singer, and film producer who has made significant contributions to both Bollywood and Hollywood. She gained international fame through her role in the television series "Quantico" and has since starred in successful films.

2) The Indian Ocean is the third-largest ocean and is characterized by its warm waters and diverse marine life.

3) The ozone layer, located in the Earth's stratosphere, protects us from harmful ultraviolet (UV) radiation.

4) The universe is estimated to be around 13.8 billion years old.