Everything is energy, the universe is made of atoms. I find Quantum Physics very interesting, especially the ‘Double Slit Experiment’, which has made me question the concept of objective reality, where things just randomly happen to me.
This video explains the experiment in a simple way:
As the video shows electrons (matter) can behave as both matter and as waves depending on them being observed or not. When you observe something, you see matter, and when you don’t – the particles are behaving like waves.