Is Reality Real?

The things and people in our lives are merely illusions. How do we know that any of these objects and creatures actually exist? Maybe they're constructs of our own internal mechanisms, spawned by our subconscious for unknown purposes.

We keep discovering new particles and fundamental forces, from molecules to atoms, that drive our bodies and our world. 

It's entirely possible that the universe could be made up of dozens or thousands of dimensions that we'll never experience in any direct way.