Quantum physics is the realm of the strange. And one of the strangest discoveries in the field is also one of the most fundamental: Particles fired at barriers with two slits in them can act like waves and go through both openings simultaneously. For more than 200 years, “double-slit experiments” reveal particles can behave like waves, whether they are photons, electrons, neutrons, atoms, or even molecules made up of 2,000 atoms. Now, scientists have pushed the boundaries even further — and got weirder.
