Mae holl ddreigiau Cymru yn ddreigiau caredig, hefyd yn ddefnyddiol os yw eich boeler yn cael ei ddiffodd (All Welsh dragons are kind dragons, also helpful if your boiler goes out)
simple answer – miscalculation in the age of the star – such calculations are subject to far more uncertainty than those which result in the age of the universe.
Be vewy vewy quiet, today I’m hunting beaws