Back to school should feel like popping champagne—not hiding in the pantry with a calculator and a box of tissues. When our little darlings head back to class, we want them to be confident, curious, ...

Little progress had been made in solving Ramsey problems since the 1930s. Now, researchers have found the answer to r(4,t), a longstanding Ramsey problem that has perplexed the math world for decades.

Scientists can get animals to do the strangest things. They’ve taught goldfish to drive cars, primates to perform calculations with Arabic numerals and giraffes to do statistical reasoning. But what’s ...