Just before Hurricane Milton slammed into Florida as a Category 3 storm on Wednesday, many people reported that the sky above them turned a sinister purple hue. A sign of the apocalypse? Well, yes, ...

Earth's atmosphere scatters sunlight, making the sky appear blue due to shorter blue light waves. Longer waves, like red and ...

ST. LOUIS – The sky is always changing colors—from a bright blue on a clear day, to red and orange sunrises or sunsets, or multiple colors of a rainbow—there’s a lot going on that we don’t always ...

When we gaze up at the sky, it's easy to assume it's always looked blue all through the years. After all, the sky's colour is such a consistent backdrop in our daily lives. But Earth’s past is full of ...