1) The highest mountain in Africa is Mount Kilimanjaro, standing at 19,341 feet (5,895 meters) tall.

2) The Great Barrier Reef in Australia is the largest living structure on Earth and can be seen from space.

3) The concept of sovereignty refers to the supreme authority and power of a state to govern itself, make decisions, and control its own territory without interference from external forces.

4) The world's oldest known recipe is for beer and is over 4,000 years old.