1) J.K. Rowling's "Harry Potter" series of books has sold over 500 million copies worldwide and has been translated into 80 languages.

2) Political ideologies such as liberalism, conservatism, socialism, and communism shape and influence policies, governance, and societal values in different countries and contexts.

3) 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.

4) The Dead Sea, bordered by Jordan to the east and Israel and Palestine to the west, is a hypersaline lake known for its high salt concentration. It is the lowest point on Earth's land surface and provides unique buoyancy, attracting visitors who enjoy floating in its waters.