http://scienceblogs.com/laelaps/2008/04 ... _rober.php
wywiad z Bakkerem
wywiad z Bakkerem
Bob mĂłwi miÄdzy innymi o tym, dlaczego hipoteza Hornera odnoĹnie ontogenezy pachycefalozaurĂłw jest bĹÄdna
http://scienceblogs.com/laelaps/2008/04 ... _rober.php
http://scienceblogs.com/laelaps/2008/04 ... _rober.php
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Jest mĹody pachycefalozaur:
[quote=""Robert Bakker""]The transformation suffered by the pachycephalosaur skull was so great that no living species could come close to the degree of re-structuring. (...) We have a genuine juvenile Pachycephalosaurus, barely two-thirds the length of an adult. According to Jack's theory, this head should look like a Dracorex, with no dome and long horns. But the juvenile skull has a shape that's 95% like the adult stage. The horns are small. The temporal holes are gone. And the dome is huge and dome development has distorted the neighboring bones above the eye. This juvie Pachycephalosaurus is just as small as the Dracorex skull [/quote]OsobiĹcie mnie to przekonuje. A co sÄ dzicie o dymorfizmie pĹciowym? MoĹźe samice miaĹy pĹaskie Ĺby i wiÄksze kolce? Ale, z drugiej strony po co samicom kolce? Ĺťaden z dwĂłch naukowcĂłw nie pisze o tym, wiÄc moĹźe Ĺşle myĹlÄ i dymofizm nie ma nic do rzeczy?
A jak widzÄ takÄ argumentacjÄ, to szlag mnie trafia
PS bardzo ciekawy blog
[quote=""Robert Bakker""]The transformation suffered by the pachycephalosaur skull was so great that no living species could come close to the degree of re-structuring. (...) We have a genuine juvenile Pachycephalosaurus, barely two-thirds the length of an adult. According to Jack's theory, this head should look like a Dracorex, with no dome and long horns. But the juvenile skull has a shape that's 95% like the adult stage. The horns are small. The temporal holes are gone. And the dome is huge and dome development has distorted the neighboring bones above the eye. This juvie Pachycephalosaurus is just as small as the Dracorex skull [/quote]OsobiĹcie mnie to przekonuje. A co sÄ dzicie o dymorfizmie pĹciowym? MoĹźe samice miaĹy pĹaskie Ĺby i wiÄksze kolce? Ale, z drugiej strony po co samicom kolce? Ĺťaden z dwĂłch naukowcĂłw nie pisze o tym, wiÄc moĹźe Ĺşle myĹlÄ i dymofizm nie ma nic do rzeczy?
A jak widzÄ takÄ argumentacjÄ, to szlag mnie trafia
A kto byl by "apex predatorem"? (jak to jest po polsku - czoĹowy drapieĹźnik)?Jack Horner pisze:Comparing T-rex with Velociraptor, virtually all characters are the opposite of one another. T has short arms, V has long arms, T has long femur/short tibia, V has short femur/long tibia, T has large olfactory, V has small olfactory, T has bone-crushing teeth (and gains them during ontogeny), and V has bladed-shaped meat-slicing teeth, T is common in its ecosystem, and V is rare.
Nowy argument (przynajmniej dla mnie, i w sumie taki prosty...)Robert Bakker pisze:Why would Triceratops invest in five times as much bone volume in its frill? Well...to me the answer is obvious. Because the commonest predator has evolved great, armor-penetrating teeth
PS bardzo ciekawy blog
Fajna argumentacja :D Welociraptor byĹ drapieĹźnikiem. Tyranozaur byĹ zupeĹnie inaczej zbudowany. Tyranozaur nie byĹ drapieĹźnikiem.nazuul pisze:A jak widzÄ takÄ argumentacjÄ, to szlag mnie trafiaJack Horner pisze:Comparing T-rex with Velociraptor, virtually all characters are the opposite of one another. T has short arms, V has long arms, T has long femur/short tibia, V has short femur/long tibia, T has large olfactory, V has small olfactory, T has bone-crushing teeth (and gains them during ontogeny), and V has bladed-shaped meat-slicing teeth, T is common in its ecosystem, and V is rare.
GoĹÄ b potrafi lataÄ. Nietoperz jest zupeĹnie inaczej zbudowany. WaĹźka jeszcze inaczej. Nietoperz i waĹźka nie potrafiÄ lataÄ. :D
- Daniel Madzia
- Jurajski allozaur
- Posty: 1609
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Kolejny wspanialy wywiad, tym razem z Jerrym Harrisem. Sam mialem okazje troche z nim "poemailowac" i rzeczywiscie, Dr. Harris jest bardzo sympatycznym czlowiekiem - przynajmniej takie wrazenie z jego mailow mialem. 

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- Daniel Madzia
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