The decades-old limit on how long human embryos can be grown in culture is under debate. A new road map outlines how to extend the length of culture responsibly.

Chinese researchers are preparing the details for the publication of another scientific milestone, the creation of a chimera with a human heart and a kidney developed from human stem cells in pig ...

A new tool allows parents undergoing in vitro fertilization to screen their embryos for health issues, but is it ethical? Genetic disease is believed to be linked to 41 percent of U.S. infants ...

When the top spotty fish in a tank disappears, the runner-up turns aggressive within minutes, rushing and nipping rivals ...

In a baffling show of generosity, killer whales across the globe are giving fish to humans—and scientists are racing to ...

I'm a heart surgeon and heart attack survivor. Never ignore these 6 heart symptoms How to hard boil eggs without using water First images from the largest camera ever built reveal millions of ...