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Growing up fast

Duration: 01:08

An amazing collection of Allosaurus bones shows just how quickly a baby dinosaur could grow. Dr Paul Bybee looks at Allosaurus thigh bones. The smallest bone is about 18cm in length and would probably belong to a dinosaur about a metre and a half in length, standing about a metre or so off the ground. The largest bone is from a sub-adult. In life it was probably close to 8 metres in length and standing off the ground about 2.5m. Thin sections of Allosaurus bone can be compared to crocodile and bird bones. They are very similar to bird bones, so Allosaurus probably grew very rapidly like a bird.

Available since: Mon 27 Sep 2010


Kenneth Branagh
Paul Bybee
Rebecca Hanna
Octavio Mateus
Scott Rogers
Dale Russell
Michael Stoskopf
Tim Williams
Kate Bartlett
Executive Producer
Tim Haines

This clip is from

Walking with Dinosaurs Big Al, Big Al Uncovered

2/2 A look at the scientific work which went into the reconstruction of Big Al the Allosaurus.

First broadcast: 27 Dec 2000

Image for Big Al Uncovered Not currently available on BBC iPlayer

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