A new blood test can detect a precursor to liver disease, which can in turn be a harbinger of cancer. The hope is that the test could help prevent liver cancer before it occurs. The test uses a ...

Testing pregnant people's blood to look at free-floating DNA can tell doctors about the health of the fetus. But these tests sometime turn up DNA... A new kind of blood test can screen for many ...

DNA is everywhere in the world's oceans—not only packaged inside cells from skin, scales, mucus, feces, and blood, but also floating freely. Sequencing such "environmental DNA" (eDNA) from open water ...