The paramedic said although the light did not cause any lasting effects it was "uncomfortable", and could have been much worse if the pilot had been involved.
Although several light and laser therapies have FDA approval as medical devices to treat acne, no true photodynamic acne therapy, combining photosensitizer and light, has been approved.
Although quasars are light days across, they are billions of light years from Earth, which means that most of what scientists know about them comes from extrapolations and not direct evidence.