1) The lotus flower is considered a sacred symbol in many cultures and is associated with purity, enlightenment, and rebirth.

2) Angelina Jolie is an American actress, filmmaker, and humanitarian. She has received critical acclaim for her performances in films such as "Girl, Interrupted," "Mr. & Mrs. Smith," and "Maleficent," and has been actively involved in humanitarian work around the world.

3) The abolition of slavery in the United States was officially proclaimed with the ratification of the 13th Amendment to the Constitution in 1865.

4) The smallest unit of time is known as a zeptosecond, which is equal to one trillionth of one billionth of a second.