The change to impossibly is correct, however:lunagillian wrote:
Further more for Voro manticore hatchling:Should be "Their jaws seems to grow impossibly wide for a split second,"Their jaws seem to grow impossible wide for a split second,
Changing "seem" would actually make it incorrect. Jaws is a plural word, and "seem" is used for plurals. "Seems" is used with singular forms.