Scientists are baffled by a Russian dog who has been aging at an amazing rate of 7 years for every human year since he was born.

"The puppy was born in 2011," said Russian scientist Sergey Federov, "but already he’s approaching age fourteen. It’s just astonishing."

The Russian Ministry of Health has dispatched a team to investigate the dog and make sure his rapid aging is not the result of an infectious agent.

In the U.S., the CDC has closed all puppy travel into the country from Russia until further notice.

Via jonathan_moreau.