Hepatitis B and C are spread through blood and body fluids. To cut your risk, don't share items like toothbrushes, razors, or needles. Limit the number of sex partners you have, and always use latex condoms. There's no vaccine yet for hepatitis C, but there is one for hepatitis B.
This gives their neck greater flexibility so they can turn it around to 270 degrees. They have to do this because, unlike us, they cannot move their eyeballs at all in any direction. <br /> Owls can't really turn their head all the way around. They can turn their head 270 degrees (3 quarters). Owls have fourteen vertebrae bones in their necks which is twice as many as humans. This gives their neck greater flexibility so they can turn it around to 270 degrees. They have to do this because, unlike us, they cannot move their eyeballs at all in any direction. Owls can't really turn their head all the way around.
Birds have relatively large eyes compared to the size of their head. A human eye weighs less than 1 percent of the weight of the head. But owls have the largest eyes. Owl eyes are so large that there is little room in their skulls for eye muscles.Thus an owl turns its head, sometimes as much as 270 degrees, rather moving its eyes, to follow an object.Contrary to popular belief, owls have excellent vision both in daylight and at night.wl eyes are so large that there is little room in their skulls for eye muscles. Thus an owl turns its head, sometimes as much as 270 degrees, rather moving its eyes, to follow an object. Contrary to popular belief, owls have excellent vision both in daylight and at night.