Neigh-ja vu: horses and cloning

Updated 1240 GMT (2040 HKT) February 20, 2015
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Tamarillo and William Fox-Pitt rode to team silver at the Athens Olympics in 2004. What does the future have in store for Tamarillo's clone, Tomatillo? JOCHEN LUEBKE/AFP/Getty Images
This is Tomatillo, otherwise known as Tamarillo's clone. Tomatillo's owners say his future almost certainly lies in breeding, not sport. Guinness family
Mary Guinness, left, is the owner of both Tamarillo (pictured, with William Fox-Pitt) and Tomatillo. She believes cloning will come to be much more widely accepted. JIM WATSON/AFP/Getty Images
The foal on the right, seen in 2005, was the first to be cloned in North America under the guidance of Dr Katrin Hinrichs, of Texas A&M University. Texas A&M University
Eric Palmer, pictured here with cloned horse Pieraz, founded the company Cryozootech. He believes cloning is not "the future" of breeding, but one option that helps to preserve the most successful genes. PIERRE VERDY/AFP/Getty Images
This clone of ET, shown in a photo from 2007, was one of the earliest clones of a successful sporting horse. The original ET was a well-known showjumper. LAURENT CIPRIANI/AFP/Getty Images
August 2003: Prometea (left), the world's first horse clone, and her mother Stella Cometa pose in the stable of the Laboratory of Reproductive Technology in Cremona, around 80 km from Milan in northern Italy. VINCENZO PINTO/AFP/Getty Images/file