Can a page be also a blog?

I’ve got the Arras theme and I’ve changed the home page to be what I want, which is more like an intro, with the slideshow and some basic, unchanging “posts.” Now I’d like to have the actual live, constantly updated blog be on another page. I’ve seen the default “About” page, but it looks like just a variation of a single post. I’ve created other new pages, but they too look to be just single posts. Is there a way to have the actual blogging happen on one of my new pages?