SEO Moz regularly reports for any website that we should be using a canonical URL on every page.  In the case of Live Blog, it doesn't have an option to turn this on or modify it in any way.  

It would be very nice if a new release were to come that included Canonical URLs turned on by default in the Manage area.  It should assume that canonical URLs are not already in page settings.  If it is, those folks should be instructed to remove it, because it's already hurting their SEO.  

Reference: https://www.mandeeps.com/support#/issue/65741