Horses that are good minded and pretty “I was raised just like these horses are, on the ranch.” – Jim Brinkman The Pitzer ...

In this May 5, 2018, file photo, Mike Smith rides Justify to victory during the 144th running of the Kentucky Derby horse race at Churchill Downs in Louisville, Ky. (AP Photo/Morry Gash, File) ...

Researchers are helping uncover new information about the Y chromosome in horses, which will help owners identify optimal lineages for breeding and help conservationists preserve breed diversity.

They look like ordinary foals, docile with honey brown coats and white facial patches, content to spend their days munching alfalfa in a cordoned-off pasture in rural Buenos Aires province. But these ...