Almost a century ago, a mathematician came up with a puzzle that was so seemingly simple and yet so fiendishly difficult that it has been distracting other mathematicians ever since. It has become a ...

In mid-May, OpenAI announced that an internal AI model had disproved the Erdős unit distance conjecture, a famous problem in discrete geometry that had stumped human mathematicians for the last 80 ...

More affordable than ever, 3D printers are booming for personal, professional, and educational use. We've been testing them for over a decade and are here to help you find the right option. Since 2004 ...

Let the Rapping Unicorn's fun song and movement routine teach your class the 9 times table, while encouraging them to be physically active. This is a great introduction or refresher for students and ...

The Posh Pooch has a song and movement routine to help students learn the 5 times table. This song and movement routine encourages physical activity in the classroom, while giving students the chance ...

Your favorite photos deserve to exist as more than digital shadows in bits and bytes. Here's how to pick the right photo printer—whether for humble snapshots or big, bold art prints—plus our top ...