hummingbird skull necklace | silver Dan Linus Pauling and Robert Corey

Linus Pauling and Robert Corey introduced the alpha helix and the beta sheet in a series of 1951 papers

the answer is more personal

and in the radiology of cervical-spine trauma

mostly dipalmitoylphosphatidylcholine plus surfactant proteins A through D) lines the alveolus and reduces surface tension

hummingbird skull necklace | silver Dan Linus Pauling and Robert CoreyHummingbird skull necklace sterling silver A heart that beats up to 1,260 times a minute. A body that drops into near ambient torpor overnight to survive on the metabolic edge. A tongue that licks nectar at 18 laps a second. The hummingbird is a study in physiological extremes, and it all begins at the skull. Worn here as a 40 mm sterling silver pendant. The Anatomy of the Hummingbird Skull The hummingbird skull is built for precision nectar