I'm curious, how does it work in the US? In Europe, you first study 3 years to get a bachelor's degree, then 2 more years for a master's degree (or an engineer

I'm curious, how does it work in the US? In Europe, you first study 3 years to get a bachelor's degree, then 2 more years for a master's degree (or an engineer degree), then you apply for a PhD which is supposed to last 3 years. In natural sciences they do last 3 years in general, in human sciences they are usually quite longer.