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Sidney Herald
Sidney , Montana
December 10, 2003     Sidney Herald
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December 10, 2003

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10, 2003 Newspaper in education SIDNEY HERALD 7A EXPLORING THE REALMS OF HISTORY, SCIENCE, name Cretaceous Comes from the word for chalk Millions of fossilized organisms and shells are found in deposits in rock dating back to this Massive floods invaded the land, and Part four of four North America was ' a shallow sea. Geologic activity the Rocky Mountains upward, and sediments from the washed eastward onto plains, where a vast number roamed. Dinosaurs flourished and diversified into than ever before. Though scientists disagree, e from md drier. of the Cretaceous, an inexplicable event about a great extinction. On land, the dinosaurs died out, survived by most of the plant life and newly evolving smaller mammals. A smaller fraction of the marine animals and plants survived the event. Pteranodon (TERR-an-O-donn) Wingspan: 23 feet (7 m) ~~ This flying reptile ...t- ....... probably was a glider. .s Its relatively large eyes may have helped it search for !ish. :i NATURE & TECHNOLOGY x Did you know? Triceratops (try-SERRA-tops) Length: About 30 feet (9 m) massive herbivores had a bony neck frill. were one of the last of the dinosaurs to evolve, and one of the most numerous. They traveled in small groups or herds. Oviraptor ( Length: About 6 feet (1.8 m) The earliest fossil of an oviraptor was found ..... " ....... near a nest containing what were thought to be the eggs of Protoceratops. Up until a few years ago, scientists thought the oviraptor was an "egg-thief," but then proved that the eggs were her own. Sea level was high throughout much of the Cretaceous period. At its maximum height, only about 18 percent of the Earth's surface remained uncovered by water, as compared to approxi- mately 28 percent today. Camivorous dinosaurs developed many kinds of advanced teeth and claws during the Cretaceous period. Many new types of plants devolped during this time, including figs, magnolias, poplars, wil- lows, sycamores and herbs. With the advent of many new plant types, insects also diversified. Deinonychus (die-NON-i-kus) Length: About 8 feet (2.5 m) This predator was fast, agile and intelligent. It was believed to be a pack hunter, using the enlarged "terrible claw" on the second toe of each foot to disembowel its prey. The Macmillan Illustrated Dictionary of . New York; Encyclopedia, Dorling Kindersley, ,q Uack in ..... Tyrannosaurus rex (tie-RAN-oh-SORE-us-REX) Length: About 46 feet (14 m) Perhaps the most well-known of all dinosaurs, the Tyrannosaurus rex was an awesome predator that could have weighed up to 8 tons. It was armed with fangs measuring up to 6 inches long and had a bite force that could have easily ripped through a car roof. The function of its tiny, two-fingered hands remains a mys- tery. It is lilkely that the Tyrannosaurus rex both hunted and scavenged. N. America Studios Inc. r United Feature Syndicat~ Inc. :i'i/ ! : : These animals may not have shared the same habitat or lived at the Pteranodon Oviraptor Tyrannosaurus rex Triceratops same time, but they are shown in scale with each other on this page. Late Cretaceous Late Cretaceous Late Cretaceous Late Cretaceous Europe Asia N. America N. America LEARN ALL ABOUT THE ANGLO-SAXONS IN THE NEXT INSTALLMENT OF WORLD OF WONDER For a list of upcoming topics, go to www.comics,com/WoW e !z Community involvement, What can you afford? by People an#i Businesses who caret. Electric SIDING AND WINDOWS Sidney * 482-2616 ) ain Street l aundrora t 407 S. Ellery Ave. 7:30 a.m. to 10 p.m. 7 days a week Mexican & American food 102 E. Main, Sidney 433-1839 J ...we are your story! Deniece Schwab 482-2403 own & Lambert o 774-3475 IZZA H0us For 433-1971 710 S. Centrali : Sidney