Owl turns its head 270 degrees

PLS VISIT http://goo.gl/kXzUs AND SUBSCRIBE It's the owl's greatest trick - turning its head almost a full circle.

The puzzle has been how the bird doesn't throttle itself in the process. If we did it, we'd cut the blood supply to our brains and pass out.

But according to two US-based scientists, the owl has some very smart bone and vascular structures running along its neck to the skull.

These features protect blood vessels from damage and maintain the flow even when the head is swivelled 270 degrees.