You might think that explaining why the sky is blue would be kind of simple. But even a brief explanation of it requires a lot of science. The colors of everything you see are produced in different ...

I know I believe it, and I kept believing it. And I’m realizing all my dreams right now by being here at the Met, singing this great opera.” Blue, 40, a former model and beauty queen from ...

More than 5,000 years ago, in ancient Egypt, a mixture of silica, lime, copper, and an alkali was heated, resulting in a bright blue compound known as calcium copper silicate. This striking, vibrant ...