mmcirvin: (Default)
[personal profile] mmcirvin
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.

Date: 2005-07-15 11:08 am (UTC)
jecook: (Default)
From: [personal profile] jecook
More evidence that birds are related to dinos...

Date: 2005-07-15 06:32 pm (UTC)
From: [identity profile] mmcirvin.livejournal.com
Some prefer to insist that birds are dinos, though this debate has less to do with the animals themselves than with differing philosophies of taxonomy...

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