It is also found in similar artwork on Celtic crosses and slabs from the early Christian period. The fact that the triquetra rarely stood alone in medieval Celtic art has cast reasonable doubt on its use as a primary symbol of belief.
Namibia, the second-least densely populated country in the world is also one of the newest, and is home to some of the largest sand dunes, the darkest skies, the oldest cultures, the biggest conservation areas in Africa, the worldâs last rhinos and the most complex languages on the planet â to name but a few!
Sand dunes cannot be formed without sand and wind. Most sand dunes form in deserts and sandy beaches. Enormous sand dunes in the Sahara Desert are called sand seas. Understanding the types of sand dunes and their formation assists in the development of infrastructures like gas and oil fields. It also helps in controlling the movement of sand. Subsequently, the five major types of sand dunes are Star, linear, parabolic, barchan, and reversing sand dunes. The velocity, turbulence, and direction of wind determine the types of sand dunes formed. Also, the amount of sand available also influences the kind of sand dune formed. For instance, star dunes form whenever there are large amounts of sand. 5. Star