Take, for example, the “sofa problem”: a conundrum that has both stumped mathematicians for decades, and also been “solved” ...

"Brain areas involved in processing numbers can be delineated and extra care taken to avoid damaging these areas during ...

Elizabeth I gave her name to a golden age of poets, statesmen and adventurers. Known as the Virgin Queen, or Gloriana, her union with her people became a substitute for the marriage she never made.

THE late Prof. Gibson's “Elementary Treatise on the Calculus” won the admiration of scrupulous teachers for a carefulness far in excess of what was thought adequate thirty years ago in a first ...

While PDF files are everywhere, tools for working with PDFs are harder to find. Let’s say you wanted to edit a PDF, merge multiple PDFs, split pages from a PDF, password-protect a PDF ...