1) The United States recently held its presidential election in 2020, resulting in Joe Biden being elected as the 46th President of the United States and Kamala Harris as the Vice President, making history as the first female Vice President.

2) The highest-grossing concert tour of all time is U2's "360° Tour," which earned over $735 million in ticket sales.

3) The concept of gravity was famously described by Sir Isaac Newton after an apple fell on his head.

4) Tom Hanks is an American actor and filmmaker known for his versatile performances in films such as "Forrest Gump," "Saving Private Ryan," and "Cast Away." He has received numerous awards, including Academy Awards, Golden Globes, and BAFTAs.