A flock of sheep sending text messages to its shepherd sounds like an idea from a science fiction film, but in Switzerland, researchers tested a prototype system that came surprisingly close to this.

Researchers have developed a method for cheaply producing heart valves in the span of minutes that are functional immediately after being implanted into sheep. The scientists call their method ...

Taking a step towards a major goal in heart valve prosthetics, scientists have created an adaptable heart valve replacement that can be expanded over time as the heart grows. The artificial valve ...