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What happens if my academy loses a level?

It is possible that an enemy player's Stone Hail targets your academy and destroys a level. If this happens, you loose the research points obtained with this level. However, you keep any research on the respective level that has already been completed. 

If you choose to demolish a level of your academy yourself, however, any research points obtained at this level need to be freely available before you can demolish it.If not, you have to reset researches until you have enough points.