Inflatable dinosaurs
Jul. 15th, 2005 08:49 am![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png)
PZ Myers explains how birds' lungs work (commenter "Raven" quotes a friend: "our lungs are two-stroke, and birds' lungs are four-stroke"), and describes evidence that some dinosaurs had the same arrangement, with continuous one-way airflow through the lungs propelled by an extensive system of air sacs extending into holes in their bones.
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Date: 2005-07-15 11:08 am (UTC)no subject
Date: 2005-07-15 06:32 pm (UTC)