One feature of compounds made with transition metals is their intense colour. There are many examples in nature, including gemstones and paint pigments. Even the colour of blood comes from the protein ...

The colors of rubies and emeralds are so striking that they define shades of red and green—ruby red and emerald green. But ...

Including a clarifying sulfur formula that doubles as a spot treatment, a volcanic clay option that minimizes pores, and an ...

The US Food and Drug Administration has revoked its authorization of Red No. 3 in food, drinks and ingested drugs across the ...

Herbalists believe its shape in lobes and notches is a signature tune. By this, they mean the shape is a secret code for which organs in the body a herbal plant is created to maintain in good health ...