What are the exhibitions to see in Paris in December 2018?

I will be in Paris in December and I am starting to check what exhibitions there will be in the city this winter. My passion for exhibitions brought me to the job I do today. Going back to a city like Paris is very exciting: there’s more exhibitions that there’s time to see. However, in my memories, Paris’ exhibition scene is amazing content-wise, it is not design-wise, the exhibitions being mostly traditional looking, compared, for instance, to a city like London. Plus, the art scene exhibitions is very important, which is amazing but gives less space to history and science…