Edinburgh University study concludes best genes don't necessarily have highest price tag

Alastair Wilson and Andrew Rambaut of the Institute of Evolutionary Biology at the University of Edinburgh have published a study of the relationship between stallion fees and the success of the stallion's progeny, measured by lifetime earnings.

In the second installment of our series on grass sickness, we talk to one of the leading researchers in the field.

In the first of a regular series, we find out more about grass sickness - a devastating disease that peaks during the spring months.