Think about placing dots on a flat surface. You want as many pairs as possible to be separated by the same distance. For any amount of dots, what is the greatest possible number of pairs that can be ...

Place any number of dots on a two-dimensional plane—say, a piece of paper—and measure the distance between each pair. If you rearrange the dots, how many pairs could be positioned exactly the same ...

This is an edition of the WSJ Technology newsletter, a weekly digest of tech columns, big stories and personal tech advice. If you’re not subscribed, sign up here. So long, #Tokenmaxxing. We hardly ...

Working memory is like a mental chalkboard we use to store temporary information while executing other tasks. Scientists worked with more than 200 elementary students to test their working memory, ...

In the article “Are Students Prepared for College-Level Math? A Senator Wants to Know ” (Jan. 23, 2026), U.S. Sen. Bill Cassidy, R-La. raises a valid question by asking colleges whether K–12 systems ...

Is America heading toward a national debt crisis? As an economic adviser to President Biden and an economist active in mainly Democratic policy circles since the late 1980s, I’ve spent most of my ...

OpenAI claims its new reasoning model has produced an original mathematical proof disproving a famous unsolved conjecture in geometry, which was first posed by Paul Erdős in 1946. If this sounds ...

In October 2024 I attended a workshop at Harvard University where mathematicians talked through the uses of artificial intelligence in their field. Most were less worried about the future of math than ...

Among the leading experts who study the Colorado River, Anne Castle stands out. During the Obama administration, she was assistant secretary for water and science at the Interior Department. During ...

Those responses to a new CNN poll sum up Americans’ feelings about the economy: They just feel stuck. CNN’s poll, conducted by SSRS, finds a surge in people naming high prices and the cost of living ...

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