Attribution 4.0 International (CC BY 4.0)
You can use this work for any purpose, including commercial uses, without restriction under copyright law. You should also provide attribution to the original work, source and licence. Read more about this licence.
Credit
The skeleton of a bird for comparison with that of a man. See page 40 for man illustration. Wellcome Collection. Attribution 4.0 International (CC BY 4.0). Source: Wellcome Collection.