being a metamorphmagus...tonks can change her hair color right...and can obviously change the lengths of it because in the 5th book...i dunno whta page it has that she has blonde curly hair...well i was reading the sorceror's stone and this doesnt really have to do w/ tonks but petunia had cut harry's hair...and the next morning it had grown back as it was originally...so when harry asked tonks if he could be taught 2 be a metamorphmagus...and tonks said you had 2 be born with it and it was really rare...what if harry did have some metamorphmagus in him that caused his hair to grow back...wild theory but...