Yes, and it’s so easy to do! Is there an Article, Quick Post or Event that you want to bookmark and come back to later? All you have to do is select the three dot menu on post, and select “Save Article”. The option to save a post is only available on web and mobile browsers, it's not available on the app at this time.
Whenever you’re ready to re-visit the post just click on your Profile > Saved Posts to be able to find it again.