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

2) The study of fossils is called paleontology, and it helps us understand the history of life on Earth and the process of evolution.

3) Jennifer Lawrence is an American actress known for her roles in films such as "The Hunger Games" series, "Silver Linings Playbook," and "Joy." She has won an Academy Award and several Golden Globe Awards, establishing herself as one of the leading actresses of her generation.

4) Sir Elton John, born Reginald Kenneth Dwight, is an English singer, songwriter, and pianist. With a career spanning over five decades, he is one of the best-selling music artists in the world and has received numerous awards and accolades for his contributions to music.