Acne is the bane of teenagers, but it also affects adults. In the latest edition of Periodic Graphics in Chemical & Engineering News, we look at the causes of acne and some medications used to treat it. Click here to view the full graphic.

Acne is the bane of teenagers, but it also affects adults. In the latest edition of Periodic Graphics in Chemical & Engineering News, we look at the causes of acne and some medications used to treat it. Click here to view the full graphic.
The Muslim festival of Eid al-Adha started on Sunday evening and runs through until Thursday. As part of the celebrations, some create impressively intricate art on their hands using henna. Here we take a look at the molecules in henna that allow it to be used as a dye, and how this process works.