To complicate matters even more, when heated to at least 480 degrees Fahrenheit, yellow ochre’s crystal structure changes and the goethite can transform into hematite, or red ochre. Ochre use became ...

In fact, Hurt pointed out that the oldest human-made artifact is a lump of red ochre, discovered in South Africa’s Blombos Cave, which dates back some 100,000 years old.

The color red has gone boom as loud as TNT. Not that TNT. We’re talking TNT as in Taylor and Trav. ... Red ochre, an iron oxide, dates to prehistoric times and drawings on cave walls.

For the first time, researchers have found evidence that people were using red ochre in West Africa during the Middle Stone Age. Dated to between 30,000 and 40,000 years ago, the rust-colored ...

There is so much more to colour than meets the eye. It is a subject that has occupied the minds of artists since the earliest cave painters chose to use red ochre instead of black charcoal.

“Red,” notes shop.zenartsupplies on its blog, “was widely used by artists in the Paleolithic age, since it was easily obtainable in nature. The prehistoric cave paintings are a perfect example, in ...

A red ochre dot may include the oldest, most complete print from our ancient relative. Multispectral photography of 43,000-year-old red pigment on a rock in Spain revealed an embedded fingerprint.