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 ...

the red used in the different kinds of Egyptian paintings. In addition to these samples of the pigments, all of which are native minerals and in their natural conditions, there are other reds ...

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 ...