Researchers decode retinal circuits for circadian rhythm, pupillary light response

Scientists invent 'quantum flute' that can make particles of light move together

New study sheds light on why opioids can cause gastrointestinal problems

Sir John Herschel used a solar wedge attached to his telescope to observe the Sun in the mid 19th century. A solar wedge reflects 4.5% of sunlight towards the eyepiece and a second glass filter reduces the Sun's white light by a factor of 1,000 or more