WSJ’s Shelby Holliday breaks down the training, equipment and operations of the Marine Corps’ Expeditionary Units as several get deployed to the Middle East amid a war with Iran. Photo: Lance Cpl.

This study provides an important and biologically plausible account of how human perceptual judgments of heading direction are influenced by a specific pattern of motion in optic flow fields known as ...

Researchers in China have unveiled a holographic data storage system that uses multiple properties of light, including amplitude, phase and polarization to store and retrieve information in three ...