Scientists mapping the human body at the cellular level keep running into the same surprise: beneath the apparent chaos of ...

A new study shows human immune systems differ across populations, raising new questions for medicine and global drug research ...

The brain is shielded from many substances by the blood-brain barrier, but this shield is not impenetrable. There are immune cells in the brain called microglia that can respond to potential invaders ...

A healthy human cell in mitosis, shown from nuclear envelope breakdown to chromosome separation in anaphase. Microtubules are shown in gray, while chromosomes are color-coded by depth, highlighting ...