Traffic Light Doctor is a signal tech based in Minnesota. He shares his green-yellow-red tips, tricks, and insights on social media, often while he’s working at a signal box. If you’ve ever wondered ...

When putting together graphic designs or editing photos, opaque backgrounds on images can be a hindrance - so knowing how to make the background transparent in Photoshop is a useful trick.

An odd solid that can flow like a fluid has been created from light for the first time. Studying it will help researchers better understand exotic quantum states of matter. “We actually made lig ...