The Dry Valleys in Antarctica have not seen rain for about two million years.
Why it is true
Despite being covered in ice elsewhere, this specific region is an extreme polar desert. Very strong katabatic winds evaporate any moisture, creating the driest place on Earth.
Source: Antarctic Research
Would you rather be asked first?
This is the reading side of the site, so the answer is in the sentence above — that is the whole point of it. Test yourself works the other way round: the question comes on its own, and the fact and the explanation only appear once you have answered.
Related facts
The largest desert in the world is Antarctica.
Alaska is both the easternmost and westernmost state in the United States at the same time.
Antarctica is technically the largest desert in the world, with less annual precipitation than the Sahara.
The driest place on Earth is in the Atacama Desert, Chile.