The best bike lights help you see, be seen, and stay safe when cycling at night. Our expert Will has over a decade of night-riding experience, and here are his favourite lights and his guide on how to ...

Plant responses to light are multiple. Light is an energy source, converted to sugars by photosynthesis. It is also a signal sensed by specific photoreceptors for red, blue and UV-B radiation. Absence ...

Light blocks the brain from making melatonin, the sleep hormone. Light at night can increase the risk of accidents due to daytime drowsiness. Nighttime light exposure can raise the risk of chronic ...

A representation of ultrawideband PVDF/co-polymer-based ultrasound (US) transducer technology for high-frequency hemispherical optoacoustic tomography and its potential use in hand vascular, dental, ...