From watching cinema films, you could be forgiven for thinking that all deserts are covered by sand. However, sand deserts make up only a fifth of the world’s desert. The rest are covered by small stones or just bare rock. Desert landscapes are called by Arabic names. Sand desert is called erg, stony desert reg, and areas of bare rock hammada.
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Raja Ram Mohan Roy, a great social reformer was born on 22 of May in …