Study examines what lets owls turn their heads

01/31/2013 | Our Amazing Planet

Large holes in an owl's vertebrae play a huge role in allowing the creature to turn its head 270 degrees without killing itself, according to a study published in the journal Science. Researchers injected dye into the blood vessels of dead owls and used CT scans to record the movements. In addition to the large holes, scientists found that the owl's vertebral artery enlarges as it reaches the brain, allowing extra blood flow as the head turns.

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