Researchers from the Universitat Autònoma de Barcelona (UAB) have published an analysis that reveals new functions of the ...

LONDON -- British scientists claimed Wednesday to have created human sperm from embryonic stem cells for the first time, an accomplishment they say may someday help infertile men father children. The ...

Researchers found that microplastics from everyday plastic tableware accumulate in human semen and, although not linked to ...

Almost every type of human cell is powered by mitochondria, bean-shaped organelles that use oxygen to synthesize usable energy.* These structures evolved billions of years ago from free-swimming ...

Even after decades of research, biologists are still uncovering surprises about the human body. A team of researchers from the University of Virginia and the National Institutes of Health (NIH) have ...

In a scientific breakthrough that raises a number of medical and ethical issues, researchers have used stem cells to create living, growing models of a human embryo. Because stem cells were used, ...