In early April, I was fortunate to visit London, where my youngest daughter and her husband, who was studying for one semester, resided. One of my most worthwhile activities during this vacation was a visit to the Natural History Museum, which boasts a collection of 20 million insect and plant specimens and research center. Exhibits abound with taxidermy-prepared birds, mammals, fish and reptiles; and butterflies, beetles and spiders in the thousands. The most popular displays are the life-size, 100-foot blue whale and 50-foot whale skeleton both hanging from the ceiling. Fossilized remains of a dozen different dinosaurs like triceratops and diplodocus were displayed. Upon leaving the dinosaur hall, one is greeted by a life-size, 30-foot long automated model of the dinosaur, Tyrannosaurus rex, which opened its mouth revealing huge sharp teeth when it roared.