Barcode scanners are so commonplace in grocery stores that it's hard to envision a time when they weren't the norm. This ...

Semiconductor detectors that directly measure the electrical signals produced by X-rays have hugely improved the resolution and contrast of computed tomography scanners. In the 1970s computed ...

Luis Martinez was on his way to work on a frigid Minneapolis morning when federal agents suddenly boxed him in, forcing the SUV he was driving to a dead stop in the middle of the street.

A type of childhood brain tumour called ependymoma is more common in boys than in girls. The reason for this difference turns out to be sex hormones such as testosterone.