Puzzle 1: You are given nine gold coins that look identical. You are told that one of them is fake, and that this coin weighs ...

Solution: Here is a solution in 11 steps (see table below), recording the quantities of mulled wine in each barrel and bottle ...

The dismantling of the Ed Dept., why kids aren’t reading, teacher pay. The 74 takes a look back at some of our biggest ...

This is an edition of Time-Travel Thursdays, a journey through The Atlantic’s archives to contextualize the present. Sign up here. Was there ever a time when Americans believed that kids were actually ...

Linear algebra is the foundation of science and engineering. Knowledge of linear algebra is a prerequisite for studying statistics, machine learning, computer graphics, signal processing, chemistry, ...

The continent’s ice is melting and raising sea levels worldwide. Our journalists will be sending regular dispatches as they head there with scientists trying to gauge the dangers. By Raymond Zhong and ...

Project 2061 was a long-term research and development initiative focused on improving science education so that all Americans can become literate in science, mathematics, and technology. To achieve ...