cutting

Researchers uncover why shaving can cause sharp blades to dull quickly.

Science

Cutting-Edge Research Shows How Hair Dulls Razor Blades

4:11pm August 06, 2020

by Nell Greenfieldboyce

Hair is soft compared with steel, but shaving can dull a razor surprisingly quickly. A new study examines exactly how a strand of hair can chip and crack a sharp blade.

Queue Listen Now

In a study of nearly 5,600 U.S. youths ages 12 to 17, about 6 percent say they've engaged in some sort of digital self-harm. More than half in that subgroup say they've bullied themselves this way more than once.

National
Science
Health & Safety

When Teens Cyberbully Themselves

1:03pm April 21, 2018

by Juli Fraga

In this latest form of self-harming behavior, adolescents anonymously post mean or derogatory comments about themselves on social media as a way of managing feelings of sadness or self-loathing.