1) The national animal of Australia is the kangaroo.

2) The assassination of Archduke Franz Ferdinand of Austria in 1914 triggered the start of World War I.

3) Honey never spoils. Archaeologists have found pots of honey in ancient Egyptian tombs that are over 3,000 years old and still perfectly edible.

4) The concept of virtual reality (VR) involves creating a simulated environment that can be explored and interacted with using specialized headsets and input devices.