Pushing the limits of structured light, physicists report a new type of optical vortex beam that not only twists as it travels but also changes in different parts at different rates to create unique ...

The optical rotatum's logarithmic spiral follows a pattern found often in nature, including nautilus shells. Credit: Capasso Lab / Harvard SEAS The optical rotatum's logarithmic spiral follows a ...

WASHINGTON (CN) – Noting that “hundreds of thousands” of nautilus shells are traded yearly, the National Marine Fisheries Service has proposed the chambered nautilus for Endangered Species Act listing ...