Researchers have successfully introduced human stem cells into monkey embryos in the lab, creating short-lived hybrid organisms that could prove an important step in growing human transplant organs from livestock or creating better animal models for studying human disease.

The human/monkey chimeras -- organisms that contain cells from two or more species -- survived for up to 20 days in p...

If you're drinking more, sleeping less, seeing downright scary numbers on your scale and fretting about the future, you're far from alone, a new survey reveals.

"We've been concerned throughout this pandemic about the level of prolonged stress, exacerbated by the grief, trauma and isolation that Americans are experiencing," said Arthur Evans Jr., chief executive officer of the American Ps...