dinosaurs Fossil bones discovered in Victoria have revealed that the dinosaurs that once lived in the Antarctic Circle, have been slightly different than life in other climates when it came to stay active throughout the year.
During the Cretaceous (145-65000000 years ago) in Australia was much further south than it is today, and parts of it, sat inside the Antarctic Circle. This meant that should be experienced in total darkness for many months, and perhaps the temperature is too cold.
Team of palaeontologists in Australia and the United States, dismissed his theory, which suggested some of the dinosaurs hibernated in Australia to adapt to extreme conditions of their habitat near polar.
"The hibernation hypothesis" is based on the presence or absence of tree rings in the form of brand growth, called lines of arrested growth (LAGs) in sections of fossil bones. GAL can be used to determine the age of an animal, formed as a result of the slowing metabolic processes of animals, such as those experienced during hibernation.
University of Queensland palaeontologist Dr Steve Salisbury, who was not involved in the study, is not surprised by these results. He explained that the GAL is not unique to animals that hibernate. "Most of exothermic animals - those that depend on the environment to regulate body temperature, such as crocodiles, turtles, alligators different - go through periods of faster growth and slower growth," he said.
While the revelations about the reduction in theory hibernation, which still does not give the whole story about the differences between the dinosaurs that lived around the poles, and those who do not. "The new study does not mean that there was nothing special about polar dinosaurs, but these features are not present in the bone," said co-author Holly Woodward.
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