A river delta is a landform formed by silt deposition carried by a river as it exits its mouth and enters slower-moving or stationary water. This happens when a river flows into an ocean, sea, estuary, lake, reservoir, or another river that is unable to transport the material.
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The auroras in Earth's Northern Hemisphere are called the aurora borealis. Their southern counterpart, which light up the Antarctic skies in the Southern Hemisphere, are known as the aurora australis
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This is a type of poetry, which originated in Japan, called a Haiku.
