1) The concept of compound interest can be attributed to the ancient Babylonians, who used it in their banking practices.

2) The longest English word is "pneumonoultramicroscopicsilicovolcanoconiosis," which refers to a lung disease caused by inhaling very fine silica dust.

3) The musical "Hamilton" has won numerous awards, including 11 Tony Awards and the Pulitzer Prize for Drama.

4) In Norse mythology, the Valkyries are divine maidens who serve Odin, the chief god. They are responsible for selecting warriors worthy of entering Valhalla and escorting them to the afterlife. They are often depicted as powerful and beautiful figures, riding winged horses and wielding spears.