On every article page, there is a Share Bar that allows readers to share articles in various ways, including email, posting to Facebook, Twitter, and Tumblr. You can also save articles to your Kindle, print them, and more.
The Share Bar appears on the left side of the article and moves as you scroll through the screen. You'll need to mouse over the "More" text to see all your options for sharing and saving.
If you have Zoomed in your browser screen to read larger text, the Share Bar may appear horizontally along the top of the article. You'll still see all your options when you mouse over the "More" text.