We have trillions of body clocks — a central one in the brain and others in each cell of our body. Here's how they work with light to control our health. When you purchase through links on our site, ...

Researchers have shown how ultrastable optical signals from optical clocks can be transmitted across tens of kilometers of deployed multicore fiber carrying telecommunications data. Nazanin Hoghooghi, ...

Editor's note: Signal Chain Basics is an ongoing and popular series; click here for a complete, linked list of all installments.) In Signal Chain Basics Part 56 we discussed the fundamental ...