It seems a simple enough question, but nowhere that I have looked gives any clarification on it. Loads of websites show a graded series of colours, showing you what colour your urine should normally ...

Researchers have developed a novel web tool that can accurately predict eye, hair and skin colour from even a small DNA sample, an advance that can be used when standard forensic profiling is not ...

The principles of colour perception, explained in terms of the interactions between a light source, an object and an observer. Fundamental aspects of light sources. The ways in which an object ...