Traffic along some of Seattle’s stop-and-go streets is running a little more smoothly after Google tested out a new machine-learning system to optimize stoplight timing at five intersections. The ...

The Alphabet “moonshot” project is launching a new chip to deliver high-speed internet with light instead of radio waves. Alphabet’s “moonshot factory,” known as X, has long cultivated craziness in ...

Classical and quantum mechanics don’t really get along as the science of the subatomic can get, well, weird. Take, for instance, quantum entanglement, which says that the state of one particle can be ...

An unprecedented brain study has delivered fresh clues about consciousness—suggesting it's more about perception than planning. Two leading theories went head-to-head, but neither emerged victorious.

Editor’s Note: Call to Earth is a CNN editorial series committed to reporting on the environmental challenges facing our planet, together with the solutions. Rolex’s Perpetual Planet Initiative has ...