You can tell a lot about a material based on the type of light shining at it: Optical light illuminates a material's surface, ...

If you frequently experience facial redness, irritation and small bumps, you may be dealing with rosacea, a common skin condition that impacts more than 14 million people in the U.S. alone, according ...

Sarah Bradley is a writer with six years of experience creating personal essays, reported features, and content related to health and parenting topics. Various subtypes of the human papillomavirus ...