 However, the maximum extent of the polar zone can spans up to from 53N to 90N and from 53S to 90S with an area total of 20\% of the body.
<clarity>  However, the maximum extent of the polar zone can spans up to from 53N to 90N and from 53S to 90S with an area total of 20\% of the body.
 However, the maximum extent of the polar zones can span from 53N to 90N and from 53S to 90S with an area total of 20\% of the body.