Atlanta man helped build robotic fish that swim to the beat of human heart cells

This synthetic fish is powered by human heart cells. Scientists say that they could help lead the way toward building replacement hearts from human tissue. (Photo courtesy Michael Rosnach, Keel Yong Lee, Sung-Jin Park, Kevin Kit Parker)

Scientists have built a school of robotic fish powered by human heart cells.

The fish, which swim on their own, show how lab-grown heart tissue can be designed to maintain a rhythmic beat indefinitely, a team reports in the journal Science.

“It’s a training exercise,” says Kit Parker, a professor of bioengineering and applied physics at Harvard. “Ultimately, I want to build a heart for a sick kid.”