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In 2012, Los Angeles Unified School District set up an experiment. It offered parents in some parts of the city a new option: Instead of automatically sending their middle schoolers to their ...

In quantum world, particles like photons can behave like particles (localized points) or waves (spreading out, showing interference patterns). The classic double-slit experiment is a good ...

In the late 1970s, legendary physicist John Wheeler proposed a radical question: Exactly when does the universe notice that we're paying attention to a quantum experiment? And does it really matter?