Why your dog isn't the age you think

Small correction: this doesn't imply dogs age slower when they're old than humans do. You can infer "slower" and "faster" by the slope of the graph. Slope > 1 implies dogs age faster, and Slope < 1 implies humans age faster. Since the graph always has a slope > 1, a dog at 14 will age faster than a human at 70. The correct inference would be dogs always age faster than humans but get closer to the human rate of ageing as they get older :)