As I understand it, in the double slit experiment electrons were found to exist in both wave and particle form depending on observation. The electron is a tiny speck of matter, and so does observation have the same effect on all matter? Max Planck said there is no matter as such. Is this because the wave function is the true nature of matter and physical substance only exists in observation? Again, as I understand it, the measurement problem, says that an atom has no specific size or location until it's being measured in the act of observation and until observation collapse of the wave function the atom is a wave of probability, known as the superposition. All matter is made up of atoms and so I'm wondering if all atoms exist in a superposition/wave function without an active observer or observations? In other words, are the atoms that make up all matter in a superposition when an act of observation or measurement is not placed on them? Do all the objects I see around me change from particle to wave when I'm not here to observe them? Does collapse bring into existence the particle, and thus all matter, or does it only apply to subatomic parts or a single atom? I could sum it all up with this. If a tree falls in the forest and no one is around to observe (witness) are there even any physical particles of a tree? Or are these particles in waveform and not specific to location in a superposition? It seems they would be immaterial waves, In a superposition, and so would not have a specific location to fall from. I asked these questions because in my research and study, I have read articles and watched demonstrations that have suggested the act of observation brings the whole physical universe into existence. With that said, I have also heard that science has managed to replicate the double slit experiment with things as large as molecules. This would suggest that matter outside the subatomic or atomic scale is not dual in nature and is fixed as a particle. Yet larger objects are made up of subatomic parts such as electrons. Thanks in advance!