Little House on the Prairie is remembered for its heartwarming portrayal of pioneer life—but sharp-eyed fans know it was full of bloopers, anachronisms, and quirks.Laura’s Endless Pregnancy – In season seven, Laura becomes pregnant in spring and is still expecting the following summer, thanks to continuity errors.Nellie’s Wig – Alison Arngrim’s signature curls were actually a wig, replacing hours of...