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Swordfish's Secret to Speedy Swimming Found

A mysterious gland at the base of its bill may be responsible for smoother gliding in the sea.

Published On 07/08/2016
9:00 AM EDT
The capillary network in a swordfish's head. (A) MRI scan of head, with the arrow indicating a fragment of the extended network in the skin of the head behind the eye. (B) A reconstruction of the capillary network originating from the oil gland. Credit: John J. Videler