1) The most-watched television event in the United States is the Super Bowl, with millions of viewers tuning in each year.

2) The process of impeachment involves charging a public official, such as a president or high-ranking government official, with misconduct and potentially removing them from office through a trial and vote by the legislature.

3) Emma Watson is a British actress and activist known for her role as Hermione Granger in the "Harry Potter" film series. She has since starred in films such as "The Perks of Being a Wallflower" and has been actively involved in promoting gender equality and women's rights.

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