We're staying in Sudan for today's Geo Quiz -- but heading north up into one corner of the vast Sahara Desert.
It's an arid, sun-scorched stretch of land were looking for today.
 Detecting asteroid 2008 TC3 in space
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It borders on the Red Sea -- the salty inlet of the Indian Ocean that divides Africa and Asia.
We want to know the name of this sandstone plateau.
There's no rain, very few inhabitants, and no oases in sight.
Recently -- an international team of astronomers crisscrossed this dusty and somewhat bleak landscape...searching, searching, and searching.
And what were they looking for there besides rocks and sand?
