Mega-dunes, also known as draas or whalebacks, form over hundreds of thousands of years and can be several hundred miles long.
Leyi tlhelaka yivitaniwa kokerbooms, kumbe misinya leyi tsekatsekaka, misinya leyi kokaka rinoko yinga hanya kuringana 400 wa malembe naswona yita hiswivumbeko swohambana hambana na tisayizi to hambana hambana.