The mayor of Kyiv, Ukraine, Vitali Klitschko, is sounding the alarm over the number of soldiers the country can retain as it fights to stave off Russian forces. Klitschko said Ukraine is having “huge ...

What happens when a repair job keeps throwing out new problems? This video documents the honest reality of troubleshooting, showing the new issues we found as we went and the expert steps required to ...

Ms. Sarin, a contributing Opinion writer, is a professor at Yale Law School and the president of the Budget Lab at Yale. She served in the Treasury Department during the Biden administration. It was ...

The original version of this story appeared in Quanta Magazine. If you want to solve a tricky problem, it often helps to get organized. You might, for example, break the problem into pieces and tackle ...

If you’ve ever walked into a store hoping to find a pair of plus size jeans that hug your curves in all the right places and left feeling defeated, you’re not alone. Despite the fact that a large ...

Abstract: In essence, reinforcement learning (RL) solves optimal control problem (OCP) by employing a neural network (NN) to fit the optimal policy from state to action. The accuracy of policy ...

A variation of a puzzle called the “pick-up sticks problem” asks the following question: If I have some number of sticks with random lengths between 0 and 1, what are the chances that no three of ...

A knee-high pipe sticking out of the ground not far from a school. A gurgle in a pond on rolling farmland. A patch of forest undergrowth hiding a long-forgotten, leaking oil well. Relics like these ...

Nissan is recalling more than 480,000 vehicles in the U.S. and Canada because of manufacturing defects that could cause the engine to lose power while in use. In a recall notice posted with the the ...