The virus that causes COVID-19 continues to mutate. Scientists say that's likely to continue indefinitely, and the virus will ...

Some details remain fuzzy and under investigation. But we know for certain that this back-to-the-water evolution did occur, thanks to a profusion of intermediate fossils that have been uncovered ...

Patrick Hsu has an ambitious vision for artificial intelligence in health care: an AI-generated "virtual cell" targeting health care's knottiest problem — what makes people sick to begin with.