Animal organs closing gap on transplant need show promise in easing U.S. organ shortages, with gene-edited pig kidneys advancing clinical trials.

The successful treatment in a brain-dead man could be used in living people, to prevent the immune system attacking donor organs.

The transition from aquatic to terrestrial life has been one of the most significant evolutionary challenges. This decisive ...

Sea urchins look like an inanimate bundle of needles, but a closer look at these alien-like creatures reveals a surprisingly ...