A new medical device could offer a better way to detect blood clots, especially in children, researchers say.

The "lab-on-a-chip" quickly shows how single stem cells react to different environments, a process that would take more than 1 million steps in a lab.

A new kind of hydrogel material can react dynamically to its environment—bending, twisting and self-adhering on demand.

A new "placenta on a chip" allows researchers to see what compounds pass from mother to fetus.

The new easy-to-use device can quickly screen for a variety of diseases including Zika and cancer—and costs less than $1.