These include an about module, a shop module and a newsletter module for users on Revue, the newsletter service Twitter acquired last year. If you decide that you no longer want a professional ...

Can whimsy be built into the newsletter system? The real-time feature is one module added to the Journal’s newsletter module library, so it can be tossed into other newsletters at a moment’s notice.

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. The propulsion ...