Abstract: I welcome you to the fourth issue of the IEEE Communications Surveys and Tutorials in 2021. This issue includes 23 papers covering different aspects of communication networks. In particular, ...

NASA’s James Webb Space Telescope’s NIRCam (Near-Infrared Camera) has captured a stunning view of supernova remnant Cassiopeia A (Cas A). Credit: Space.com | footage courtesy: NASA, ESA, CSA, STScI, ...

HAYWARD, Calif. (KGO) -- A gas explosion set off a major fire in a Hayward neighborhood on Thursday after obliterating at least one home, blowing out windows and shaking nearby homes. Six people were ...

When a delicate object crashes onto the floor, most people expect it to shatter into several pieces. What they might not know, however, is that the sizes of those fragments—whether from a broken plate ...