It has a purple-blue-green hue and looks like metal ... Fillamentum is a great place to start. PETG is chemically similar to the plastic that water and soft drink bottles are made of, and it's ...

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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 ...

Performances in N.Y.C. Advertisement Supported by Once used to frequent rejection letters, Blue has become a regular on major stages and is singing the title role in “Aida” at the Metropolitan ...

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 ...