What is the difference between thumbing and bookmarking?
You can think of ‘thumbing’ as a quick way to bookmark. Each time you ‘thumb up’ an article, it will be archived on your Thumbed page for later viewing. Bookmarking has the added functionality of being able to add terms to automatically categorize your saved pages. You can also easily share your bookmarks with friends by making them public so they appear on your Profile page. Articles you have thumbed can only be viewed by you on your Thumbed page.