For the first time, a stem cell model has produced a structure resembling an early human embryo with a yolk-sac-like structure, from a single starting stem cell population and without direct genetic ...

By examining genetic clues that linger in adult cells, scientists have now gained surprising insights into the developmental ...

Scientists mapping the human body at the cellular level keep running into the same surprise: beneath the apparent chaos of tissues and organs, there is a hidden order that looks a lot like pure ...

Every pregnancy depends on an organ that most people will never see. As organs go, the placenta — the tissue that surrounds a developing fetus — is a jack of all trades. It can filter toxins like a ...

Stem cells are precursors of a variety of different cells: They can turn into anything from blood to bone to muscle. Human blood stem cells, known as hematopoietic stem cells, are the forerunners of ...

The human immunodeficiency virus (HIV), which is the cause of AIDS, is a master of deception, using just nine genes to hijack ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Electrically stimulating key cells in the immune system could ...

Every day the human body replaces billions of cells, flushing out the old and generating the new, healthy ones. The average lifespan of a red blood cell is just under four months, while skin cells ...