Name: Jack Horner: Dinozauri care-şi schimbă forma
Uploaded: 2012-02-09T15:59:58Z
Duration: 18 min 6 s
Description: Unde sunt puii de dinozaur? Într-o prelegere fascinantă de la TEDxVancouver, paleontologul Jack Horner descrie cum secţionarea craniilor fosile a dezvăluit un secret şocant despre câţiva dintre cei mai iubiţi dinozauri ai noştri.

Jack Horner: Jack Horner: Dinozauri care-şi schimbă forma

Jack Horner: Dinozauri care-şi schimbă forma

Unde sunt puii de dinozaur? Într-o prelegere fascinantă de la TEDxVancouver, paleontologul Jack Horner descrie cum secţionarea craniilor fosile a dezvăluit un secret şocant despre câţiva dintre cei mai iubiţi dinozauri ai noştri.

Many classic dinosaur species are actually just the young or adolescent forms of others, mistaken for adults because of dramatic changes as they grew. Museums collected only the biggest fossils, so baby dinosaurs seemed to vanish. Bone analysis reveals that some dinosaurs, like Triceratops and Pachycephalosaurus, were mislabeled as multiple separate species when they were really just growth stages of the same animal. This discovery rewrites the dinosaur family tree and shrinks the cast of prehistoric giants.