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Researchers tested
from 105 dogs. After some
crunching, they created a
to show dogs and people age at
rates. A one-year-old dog is
to a 30-year-old human, while a four-year-old dog is like a 52-year-old. A
said: "A nine-month-old dog can have
, so we
knew that the 1:7 ratio wasn't an
measure of age." He added that different
of dog age at different speeds.
