Ready for a fresh set of puzzles? Click here for the July/August 2025 Puzzle Corner, brought to you by guest editor Ed Faulkner ’03. Send problems, solutions (by August 1), and comments to puzzlecorner@technologyreview.com. Editor emeritus Allan Gottlieb ’67 launched Puzzle Corner in 1966. Find back issues through 2022 at cs.nyu.edu/~gottlieb/tr and more recent back issues at technologyreview.com/puzzle-corner.
On the season 11 finale of “Entrepreneur Elevator Pitch,” contestants lay it all on the line for the chance to transform their businesses and their lives.
Leaving aside meteorites that strike Earth’s surface and spacecraft that get flung out of its orbit, the quantity of materials available on this planet isn’t really changing all that much. That simple fact of our finite resources becomes clearer and more daunting as the pace of technological change advances and our society requires an ever…
A Kumon Math & Reading Centers franchise is more than a tutoring club. Kumon Math & Reading Centers lets you contribute positively to your community while also operating a business.
When people report your email as spam, chances are your next email will go to the junk folder. Here’s what you’re doing wrong — and how to protect yourself from spam complaints.