title: How does Actors work compared to threads?
body: <p>Is there any good and short explanation of how <em>Actors</em> works compared to threads?</p>
  
  <p>Can't a thread be seen as an actor and send messages to other threads? I see some difference, but it's not that clear for me. Can I use <em>Actors</em> in any language by using threads differently?</p>