Pope Leo’s first words from the balcony in Rome were “Peace be with you.” Of all the things our new Holy Father could have chosen to say, that was the greeting he wanted the world to hear. He didn’t ...

Some animals can sense infrared light, although probably not well enough to form images. Night-vision goggles enable humans to see infrared radiation, but they are bulky and require a power source ...

“Peace be with you all! Dear brothers and sisters, these are the first words spoken by the risen Christ, the Good Shepherd who laid down his life for God’s flock. I would like this greeting of peace ...