As 'Wicked' prepares to cast its spell over the box office, we look at how portrayals of witches on screen have evolved to become symbols of female empowerment and an embracement of otherness.

An experimental nasal spray has helped clear toxic protein buildups in the brains of mouse models of Alzheimer's. Its ...

The middle ear and Eustachian tube have a mucous lining that traps and protects against harmful bacteria. But when you’re ...