The imaging team of NASA's Perseverance Mars rover took advantage of clear skies recently to capture one of the sharpest ...

Children have a magical way of looking at the world. They ask questions that adults might have stopped wondering about years ...

In August 1883, the eruption of the Krakatoa volcano in Indonesia triggered a series of atmospheric phenomena so dramatic ...

In actual fact, the sea is blue for similar reasons as the sky. When sunlight hits the ocean, the colours with longer wavelengths, red, orange, yellow and green, ar absorbed so that blue is left over.

That’s what we see when we look up at a blue sky. The light – especially the blue light – is splattered and scattered so much that wherever we look, we see a blue glow.

Adding white But the daytime sky isn’t the same blue all over. You're more likely to find the Dulux bright skies color closer to the horizon, where the blue is more washed out or lighter.

Put these three things together, and a blue sky is inevitable. Here's how it all comes together. Light of many different wavelengths, not all of which are visible, are emitted by the Sun.

If it really was blue light that was scattered most, then we'd see the sky as a slightly greenish blue. We don't see the greenish hue, however, because of the sky's violet light.