One big animal family

A new study takes a close look at you and your dog’s ancient relative

By Stephen Ornes, 13:55 PM December 14, 2011

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In your family, it’s easy to figure out whom you’re related to. Siblings share parents, cousins share grandparents and great-grandparents and so on. Go back far enough in time and you’ll discover that you share ancestors with every person on Earth. Continue back even further, and you’ll find an even broader connection: All animals trace to a common ancestor, which means that you, your dog and your fish are related.

In a new study, scientists report genetic clues indicating that the most r...

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