Prehistoric humans extensively used ocher, a natural earth pigment composed of clay ... "I think the initial motivation to use blood red pigment stemmed from this very primordial and ancient ...

Early Use of Natural Pigments Evidence shows that early humans used natural substances like red ochre ... to read about 50 amazing finds on Google Earth.

The U.S. Food and Drug Administration banned Red Dye No. 3 Jan. 15, and food manufacturers are scrambling for safer alternatives. Ohio State researcher Monica Giusti has spent years studying natural ...