By Joshua BaroneCorinna da Fonseca-WollheimZachary Woolfe and Oussama Zahr The New York Times’s classical music and opera critics see and hear much more than they review. Here is what hooked ...

It's the headline violinists, bassoonists and bangers of big expensive drums look for each year: classical music is back, and young people like it again. To be fair, the data mostly checks out ...

A well-known example of learning is Ivan Pavlov's famous experiment, where a dog learns to associate the sound of a bell with food. This type of learning is called classical conditioning and involves ...

A well-known example of learning is Ivan Pavlov’s famous experiment, where a dog learns to associate the sound of a bell with food. This type of learning is called classical conditioning and involves ...

But a crucial step is skipped because it has puzzled scientists since the earliest days—how does the real, classical world emerge from, often, a large number of solutions for the wave functions?

Classical conditioning, famously demonstrated by Pavlov’s dogs, involves forming passive associations between stimuli—like linking the sound of a bell with the anticipation of food.