1) 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.

2) The first computer mouse was invented by Douglas Engelbart in 1964 and consisted of a wooden shell and two metal wheels.

3) The Cannes Film Festival, held annually in France, is one of the most prestigious film festivals in the world.

4) Elvis Presley, often referred to as the "King of Rock and Roll," has sold over one billion records worldwide.