Nature: For the first time, researchers have used a laser beam to control a heartbeat. Michael Jenkins, a biomedical engineer at Case Western Reserve University in Cleveland, Ohio, and his team report in Nature Photonics that they succeeded in syncing the heartbeats of embryonic quails with infrared lasers. More studies are needed, but their initial results indicate that lasers could be used to study how hearts form and such conditions as congenital heart defects and could possibly lead to the development of light-based pacemakers. Although it has been known for some time that light can stimulate nerve activity, researchers still don’t know how light controls heart rate.
The finding that the Saturnian moon may host layers of icy slush instead of a global ocean could change how planetary scientists think about other icy moons as well.
Modeling the shapes of tree branches, neurons, and blood vessels is a thorny problem, but researchers have just discovered that much of the math has already been done.
January 29, 2026 12:52 PM
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