Our Gemara discusses the ritual impurity incurred by those who burn certain sacrifices outside Jerusalem, including Yom ...

Christmas stockings have been a tradition in the UK since the Victorian era. While this festive fun was originally reserved ...

Sunlight looks smooth and white to the naked eye, but when I break it apart with a prism or a spectrograph, it turns out to be riddled with gaps. Instead of a perfect rainbow, the Sun’s light is ...

When you unlock a phone, step into view of a security camera or drive past a license plate reader at night, beams of infrared light - invisible to the naked eye ...

Snake-inspired thermal vision is moving from the lab toward devices that look a lot like everyday cameras and phones. By mimicking how vipers sense heat and fusing that idea with standard silicon ...