Iraq

Have you seen the video clip of what appears to be a river of sand rushing through a barren desert landscape? It went viral, perplexing viewers worldwide.

While deserts are known for extraordinary natural occurrences like sandstorms and tornadoes. This event was unlike any phenomenon ever seen before.

What looked like sand speeding over other sand eventually got its explanation. It was a flash flood, with large amounts of hail rushing through the desert due to extreme weather conditions.

Sand, a solid, can flow like a liquid (even if not the case here). Pour it from your hand to test!