In the age of Instagram and Snapchat, everyone wants to have perfect pearly whites. To get a brighter smile, consumers can opt for over the counter teeth-whitening treatments or a trip to the dentist to have their teeth bleached professionally. But both types of treatments can harm teeth. Researchers have now developed a new, less destructive method.

Most solar cells are limited by how much energy their electrons can absorb. Denting their materials could help them harvest more electricity and breeze past that limit

A study of sweaty T-shirts suggests dentists can smell when someone is anxious, and it makes them more likely to make mistakes and damage neighbouring teeth