If you open up an old Encyclopedia and look up "Climatic History", you will find an article on climate history.
Not on Wikipedia.
The redirect for Climate History goes to "Temperature record", and that article is an obvious piece promoting something, It is not an article on either climate history, or the history of climate.
In fact, the article Temperature record article does not even contain the phrase "ice ages". It only contains the word "rainfall" once, and only to tell you how uncertain it is to connect it to temperature. Unlike an encyclopedia, it doesn't even mention "wetter" or "drier", two words used a lot in talking about climate history.
There are a lot of things missing from Wikipedia, but the climate history of our planet? How does that happen?