A team of scientists from Harvard Medical School and Duke University has created a new kind of tissue that can change heart activity using only light—no wires, no surgery, no harm. This groundbreaking ...

It was stable on an actively beating heart, at body temperature, for 60 days, about the same time temporary pacemakers are used as a bridge to permanent pacemakers. What’s more, the device’s ...

Artificial light has extended our days, but it is also quietly reshaping how our brains and hearts function at night. A growing body of research now links bright bedrooms, glowing streets and ...