ultradian rhythm
ultradian rhythm A biological rhythm whose periodicity is greater than a day. For example, the body temperature of hibernating animals often shows periodic transient increases corresponding to brief periods of arousal. Also, the reproductive behaviour of many animals follows a
circalunar rhythm linked to the 29.5-day lunar cycle. Compare
circadian rhythm;
infradian rhythm. See
biorhythm.
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Triceratops battles: head-butting was an everyday event for these horned dinos.
Magazine article from: Dig; 7/1/2006; ; 700+ words
; Triceratops and its relatives, the horned dinosaurs...decades, scientists have debated how Triceratops used these horns. Some say the horns...horns were used for showing off to other Triceratops--just as a peacock does with its...
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 "Star Tribune (Minneapolis, MN)")
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Triceratops moves, slowly; The Science Museum of Minnesota's move to a new building was particularly disruptive for Fafner, its triceratops.(NEWS)
Newspaper article from: Star Tribune (Minneapolis, MN); 5/23/1999; ; 700+ words
; ...an end, a 6-ton, three-horned triceratops grazing in what is now the rugged Hell...sequoia trees. The heavily armored triceratops, more than 20 feet long, was a plant...some other reason lost in time, the triceratops died. And before its bones could be...
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SMALLEST TRICERATOPS SKULL DESCRIBED
News Wire article from: US Fed News Service, Including US State News; 3/6/2006; 700+ words
; ...mother, a three-horned dinosaur called Triceratops that could weigh as much as 10 tons...foot-long skull from the youngest Triceratops fossil ever found is on display in the...six-foot-long skull of a mature Triceratops. Standing menacingly outside the library...
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 "Rocky Mountain News (Denver, CO)")
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DINOSAUR FOSSILS FOUND AT GOLF COURSE TRICERATOPS ROAMED SITE 65 MILLION AGO.(Local)
Newspaper article from: Rocky Mountain News (Denver, CO); 2/9/1999; ; 700+ words
; ...Staff Writer WESTMINSTER -- Herds of triceratops roamed what are today the fairways...volunteer paleontologist, discovered the triceratops remains. ``We found bits and pieces of four different triceratops,'' said Young. ``We discovered...
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LAND OF THE LOST IS NOW LAND OF LOST AND FOUND TRICERATOPS SKULL DUG UP NEAR BRIGHTON IS A SCIENTIFIC THRILLER.(City Desk/Local)
Newspaper article from: Rocky Mountain News (Denver, CO); 11/18/2003; ; 700+ words
; ...the unmistakable horned skull of a triceratops. "As soon as we could see the outline...specimen is the first largely intact triceratops skull found in the Denver area. It's only the second triceratops skull found along Colorado's Front...
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World's First Triceratops Sold at Auction Will Be Unveiled in Boston.
Business Wire; 9/22/2008; 700+ words
; ...open new exhibit, Colossal Fossil: Triceratops Cliff November 15, 2008 Anonymous donor...the public this fall - a skeleton of Triceratops horridus that was auctioned at Christie...According to Christie's, the fossilized Triceratops skeleton is mostly complete, making...
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A Makeover for an Old Friend.(Triceratops studied during renovation of exhibit at National Museum of Natural History)
Magazine article from: Science News; 11/4/2000; ; 700+ words
; ...were astonished by the sad state of the Triceratops. The ancient glue used to harden the...technology to learn more about how the Triceratops stood, walked, and maybe even ran...forward from above each eyebrow--Triceratops is one of the most familiar dinosaurs...
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TRICERATOPS' HORNS WERE LETHAL BATTLE WEAPONS, NOT MERE ORNAMENTS
News Wire article from: The Hindustan Times; 1/28/2009; 630 words
; ...ANI): After searching the skulls of Triceratops in museum collections across North America...found battle scars on the skulls of Triceratops, which preserve rare evidence of Cretaceous...other horned dinosaurs," he added. If Triceratops fought each other with their horns...
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Triceratops' horns were lethal battle weapons, not mere ornaments.
News Wire article from: Asian News International; 1/28/2009; 700+ words
; ...ANI): After searching the skulls of Triceratops in museum collections across North America...found battle scars on the skulls of Triceratops, which preserve rare evidence of Cretaceous...other horned dinosaurs," he added. If Triceratops fought each other with their horns...
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Triceratops was a social animal, indicates new evidence.
News Wire article from: Asian News International; 3/24/2009; 700+ words
; ...of a jumble of at least three young Triceratops in the badlands of the north-central...of juveniles. Until now, all known Triceratops (over 50 in total) fossils have indicated...excavated a site that contained multiple Triceratops juveniles in 66-million-year-old...
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Triceratops
Book article from: The Columbia Encyclopedia, Sixth Edition
Triceratops [Gr., = three-horn face], genus of ornithischian...there were as many as 16 different species, but only one species, Triceratops horridus is currently recognized. It is characterized by its three...
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triceratops
Book article from: The Oxford Pocket Dictionary of Current English
...x2C8;serəˌtäps / • n. a large quadrupedal herbivorous dinosaur (genus Triceratops , infraorder Ceratopsia, order Ornithischia) living at the end of the Cretaceous period, having a massive head with two...
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Cretaceous Period
Book article from: Animal Sciences
...armored dinosaurs), and Ceratopsians (horned dinosaurs) replaced the giant Jurassic sauropods as the main herbivores. Triceratops fossils by the hundreds have been found, suggesting that these cows of the Cretaceous traveled in huge herds across the...
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Dollo, Louis Antoine Marie Joseph
Dictionary entry from: Complete Dictionary of Scientific Biography
...their way of life but also the history of their adaptation. The study of the ethological peculiarities of such dinosaurs as Triceratops and Stegosaurus enabled Dollo to make a rather unexpected discovery: these four-legged forms must have had functionally...
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Ceratopsia
Book article from: A Dictionary of Zoology
...the total length of the body because of the development of a large, bony frill which protected the neck and shoulders. Triceratops is perhaps the best-known member of the group. It was 5–6 m long and had three forward-projecting horns...
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