A biotech company recently announced that it's implanted another pig kidney into a human recipient. Here's what to know.

As thousands of people await a lifesaving heart, scientists are racing to buy them more time. A promising advance from scientists in Germany offers a potential solution.

While medical centers use ultrasound daily, so far this technology has not been capable of observing body tissues at the scale of cells. Physicists have now developed a microscopy technique based on ...

Democratic control and oversight of statutory intelligence agencies refer to a comprehensive set of mechanisms and processes ...