(Julia Paolercio/ Chatelaine) — Whether you’re concerned about sunburns, skin cancer or premature signs of aging, wearing sunscreen every day is the best thing you can do for your skin. But how exactly does it protect your skin—and how do you pick the best formula for your needs?

We asked Dr. Monica Li, a Vancouver-based   …

(Ben Coxworth/ New Atlas) — When someone has a problematic skin condition, the affected skin is typically either stiffer or softer than normal. A new sensor has been shown to detect such differences, potentially allowing doctors to diagnose problems more quickly and easily.

The electromechanical device was designed  …