Lighthouses have guided mariners safely home for centuries, with the first lighthouse reportedly constructed in ancient Egypt (although it was later destroyed). Although GPS is now in everything from ...

By striking a gold nanorod off-center with an electron beam, researchers found a simple way to make light spin.

A few decades ago, lightbars were the only form of emergency lighting on a patrol vehicle aside from (maybe) a spotlight. Those early lightbars had one or two rotating lights that weren’t very bright, ...