I've seen several threads in the forums about having problems building or crafting an item, only for the problem to be the person hasn't yet discovered/learned one of the materials needed for learning the recipe. And reading
this post from a thread in the Bug forum prompted me to make a suggestion. I'd think a list of discovered items would be helpful. Perhaps shoved into a side of the study panel. Even if you didn't know what you would open up once you learned something, at least you'd know what you've "discovered." So would getting a message of what new items you could build and craft when you do discover the items for a new recipe.