geography
Despite being called "dry," one desert holds the record for driest place on Earth, with some spots that have never recorded a drop of rain.
The Atacama Desert is correct — parts of it in Chile have gone decades, and in some spots even centuries, without any measurable rainfall, making it the driest non-polar place on Earth. This extreme, near-total lack of moisture comes from a combination of cold ocean currents offshore and mountain ranges that block moist air from reaching the region.
The Sahara and Gobi are both true deserts with very low rainfall, but neither reaches the Atacama's extreme, near-total absence of precipitation in its driest zones, so neither holds the record for driest place on Earth.
That same extreme dryness, combined with clear, stable skies and high altitude, is exactly why astronomers have built some of the world's most powerful observatories in the Atacama.
geography
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