Jupiter's Great Red Spot is a storm that has lasted for centuries.
Why it is true
This anticyclonic storm has been observed since the seventeenth century and is larger than Earth, with winds reaching five hundred kilometers per hour.
Source: NASA
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.