For the second time ever, a pig heart has been transplanted into a living human recipient, the University of Maryland Medical Center announced on Friday. The groundbreaking surgery was done on ...

Dr. Robert K. Jarvik, the principal designer of the first permanent artificial heart implanted in a human — a procedure that became a subject of great public fascination and fierce debate about ...

The experiments, led by separate research groups, have uncovered complementary findings. Together, their work confirms that the heart’s activity influences our perception of time as it passes.