August 28, 2026

World

Textbooks were wrong: Scientists reveal how human hair really grows

Textbooks were wrong: Scientists reveal how human hair really grows

A new study suggests human hair grows in a way scientists never expected. Researchers found that hair is pulled upward by coordinated cell movements inside the follicle rather than simply being pushed out by dividing cells at the root. Advanced 3D imaging revealed a hidden cellular “motor” that helps drive growth.

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Engineers discover ‘unexpected motion’ in drug-delivery robots

One day, tiny swimming robots may travel through the human body to deliver drugs. The medication would target only areas of need—chemotherapy drugs for a tumor, for example—avoiding healthy tissue and minimizing side effects. A research team led by Ebru Demir, an assistant professor of mechanical engineering and mechanics in Lehigh University’s P.C. Rossin College…

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