Some traditional eyeliners such as kohl, kajal, and surma have high levels of lead, according to recent research. CR explains what you need to know.

Carla Tardi is a technical editor and digital content producer with 25+ years of experience at top-tier investment banks and money-management firms. Suzanne is a content marketer, writer, and ...

Dec. 21, 2025 Superconductors promise loss-free electricity, but most only work at extreme cold. Hydrogen-rich materials changed that—yet their inner workings remained hidden because they only exist ...