"60 MINUTES PRESENTS: TALES OF FOUR-LEGGED FRIENDS" ON SUNDAY, MARCH 12

Editor's Note: These previously broadcast segments have been updated for this edition of 60 MINUTES.

SURVIVAL OF THE FRIENDLIEST - Anderson Cooper reports on the links between dog and human evolution and explores how dogs diverged from wolves and developed what one geneticist calls "friendliness mutations." Those mutations are found in the same genes that are deleted in some people with a condition called Williams syndrome. Denise Schrier Cetta is the producer.

COMPARATIVE ONCOLOGY - Anderson Cooper reports some of the most promising genetic research in dogs and people involves cancer. In a growing field called comparative oncology, scientists, physicians and veterinarians team up to study and treat similar cancers in pet dogs and people. They are using what they learn to speed potentially lifesaving treatments to both species. Denise Schrier Cetta is the producer.

WILD HORSES - Sharyn Alfonsi visits the Wyoming Honor Farm, a state-run minimum-security prison in the middle of horse country doing its part to help with the wild horse population through a program where inmates train the horses. Federal land managers say the number of wild horses roaming public land is nearly three times what it should be, and if left unchecked, their population can double every five years. Michael Karzis and Katie Kerbstat are the producers.

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