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NOVA scienceNOW: T. rex
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Program Overview
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Scientists have gained new insights into the lifespan of
Tyrannosaurus rex (T. rex) and how T. rex grew
to be so large.
This NOVA scienceNOW segment:
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reports that scientists typically find the age of dinosaurs and
many other animals by counting growth rings in certain bones.
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describes how Dr. Greg Erickson analyzed T. rex's bones
and unexpectedly found distinct lines that appeared to be growth
rings.
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reveals how Erickson determined that T. rex grew from a
10-pound hatchling to a 12,000-pound giant over 20 years, with
most of the growth occurring between the ages of 14 and 18.
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concludes that 25 to 30 years old was considered old age for a
T. rex.
Taping Rights: Can be used up to one year after the program
is taped off the air.
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