Animal · Russia, China, Germany
Dog
Canis lupus familiaris — the name this animal has in the language scientists everywhere share.
The dog was the first animal to live alongside people, thousands of years before sheep or cattle and long before anyone grew grain. Every dog alive, from the smallest to the largest, belongs to a single species and descends from the wolf.
Picture credit: Basile Morin (CC BY-SA 4.0) · Basile Morin (CC BY-SA 4.0) · Wikimedia Commons
Where does the dog live?
Home: With people on every continent.
In the wild it lives in these countries: Russia, China, Germany, the United Kingdom, the United States, Brazil.
The short profile
Fully grown: from 15 cm to over 100 cm at the shoulder, depending on the breed. It weighs about 25 kilograms. On the menu: both plants and meat.
The story behind it
Wolves and dogs are so close that they can still have puppies together. Yet one thing separates them, and it is not size or colour. Give a dog a puzzle it cannot solve — a box that will not open, food it cannot reach — and sooner or later the dog stops, turns round and looks at the nearest person. A wolf raised among people from birth keeps working at the box alone and never looks up. That glance is what tens of thousands of years of living together have made. Genetic traces point to the first dogs appearing roughly twenty-three thousand years ago, probably in Siberia, long before people kept any other animal. Everything else came afterwards: the herding, the pulling, the guarding, and the huge spread of shapes from a chihuahua to a mastiff — all of them still one species.
Find it on the globe
Dog is there as a tiny animated figure that breathes and looks around. From far away the planet is only a blue ball; detail arrives as you zoom in, and this one appears once you are close enough. Open it on the globe.
It sits at its real coordinates, not near them — the same numbers listed in the facts above. Switch off the layer for this kind of place and it disappears again; the buttons for that are down the right-hand edge.
Questions children ask
Does every dog come from the wolf?
Yes. A chihuahua and a mastiff look nothing alike, but both are the same species and both go back to the wolf. The differences are the work of breeding over a few thousand years, not of separate origins.
What really tells a dog from a wolf?
Not the teeth or the coat, but a look. Faced with a task it cannot manage, a dog turns to a person for help. A wolf, even one raised among people, carries on alone.
Why are dogs such different sizes?
Because people bred them for different jobs: small dogs to go down burrows, heavy ones to guard, long-legged ones to run. No other land mammal comes in such a range of sizes.
Where these numbers come from
Every figure on this page was checked against public reference sources before publication. Where sources genuinely disagree, the text says so.
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