Photo: iStock Picture this: You're walking along a beach at night, and with every step, the water beneath your feet flickers with an electric-blue glow. No, it's not a special effect — it's ...

This effect is due to quinine ... When a black light is shone on it, the quinine emits a captivating blue glow, making tonic water a visually striking addition to any drink.

A private US lander has captured eerie high-definition images of a lunar sunset, which NASA hopes will help unravel the ...