Add Yahoo as a preferred source to see more of our stories on Google. Illustration by Lisa Pringle This week, Morning Brief reader Collette wrote in to ask, "There may be blue sky, but what makes for ...

Visible light travels in electromagnetic waves, which we see as the colors of the rainbow. Different colors have different wavelengths of light. Violet and blue have the shortest wavelengths, whereas ...

Have you ever paused to gaze at the sky? Wondered why it stays blue all the time? Why isn’t it pink like cotton candy or green like the grass? This is a question frequently posed by kids and adults as ...

This week, Morning Brief reader Collette wrote in to ask, "There may be blue sky, but what makes for a deeper blue in one area and a lighter blue in another?" Meteorologist Jonathan Belles: It all ...