A powerful dating technique that simply works
And we can track down red’s hold over us by tracing the way artists got their colour over time – from animals, vegetables and minerals.
A nuclide of an element, also called an isotope of an element, is an atom of that element that has a specific number of nucleons.
The excavation of Neolithic burial sites has turned up jars filled with dull-coloured dried insects, kermes, which have a brilliant hidden red that was used as textile dye.
It was also a Neolithic food colouring and the colour red is still associated with health today.
Radiometric dating methods are the strongest direct evidence that geologists have for the age of the Earth.
All these methods point to Earth being very, very old -- several billions of years old.
University of Cambridge provides funding as a member of The Conversation UK. These questions are not answered by Newton’s famous experiments with prisms, which led to the colour red being defined as the long end of the visible spectrum.