Mondo Knows Facts
A dog has around 300 million scent receptors
Humans carry closer to six million, and dogs dedicate far more brain to smell The canine nose also samples air with separate channels for inhaling and exhaling, so it keeps smelling while breathing. Some dogs detect odours at parts per trillion in laboratory tests. Training lets them find specific scents among many others. It sits in Mondo's animals collection, one of 200 facts that each trace back to the reference below.
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Tags: dogs, smell, senses
A dog has around 300 million scent receptors: the short answers
- Where does this come from, and can I check it?
- Humans carry closer to six million, and dogs dedicate far more brain to smell. The figure is taken from Britannica, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
- Is this really a animals fact?
- Yes. It sits on the Animals shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
- What else can I read about it?
- The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.