Add extra information to your YouTube videos with the annotations editor. Annotations can come in the form of video captions, titles or notes; these can give your videos extra effect and make them ...

Transient Ischemic Attack, also known as "mini-stroke", occurs when there is a temporary blockage of blood flow to the brain. The American Stroke Association says that the clot usually dissolves on ...

Transients refer to astronomical phenomena with durations of fractions of a second to weeks or years. Typically they are extreme, short-lived events associated with the total or partial destruction of ...