Add Yahoo as a preferred source to see more of our stories on Google. Way back in the early 1990s, Adobe released the Portable Document Format (PDF). Ever since, PDFs have been a key tool in getting ...

Earlier this year, a group of climate scientists were outraged about a Wall Street Journal editorial. In an earlier era, they might have written a letter to the editor, or meekly submitted their ...

Would researchers scrawl notes, critiques and comments across online research papers if software made the annotation easy for them? Dan Whaley, founder of the non-profit organization Hypothes.is, ...