Readers, we are surprised so few of you knew last week's "Whatizit?" was the skull of a tyrannosaurus rex. We accepted the simple answer of dinosaur, too. Those who got it right were Gene Sikora and E.J. Oahueke of Worth, Dan Higgins of Chicago Ridge, Lois Faragher of Palos Hills, Jane Foley of Oak Lawn, Bella Fruendt of Hickory Hills, and Carol DenBesten.