Single-family homes are being added to an Oceanside ordinance that requires apartment buildings, businesses and most other property owners to shield their outdoor lighting fixtures. Light pollution ...

An expanding universe complicates this picture just a little bit, because the universe absolutely refuses to be straightforward. Objects are still emitting light, and that light takes time to travel ...

For babies born with a certain heart defect, implantation of a "shunt" is essential to their survival. A new type of shunt can be expanded using light after it's been implanted, potentially ...