Fuglenes oprindelse: Forskelle mellem versioner
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Thue (diskussion | bidrag) Det er kun press releaset som siger at fugle ikke er dinosaurer, ikke papirer. Vi bør ikke citere press releases. Se http://scienceblogs.com/tetrapodzoology/2009/07/17/birds-cannot-be-dinosaurs/ |
m Robot: Konverterer nøgne referencer, ved hjælp af ref navne for at undgå dubletter, se FAQ |
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<ref>[http://news.bbc.co.uk/2/hi/science/nature/5166518.stm 11 July 2006, Big dinosaurs 'had warmer blood'] Citat: "...The bigger a dinosaur was, the warmer its blood...smallest dinosaurs had temperatures of around 25C, close to environmental temperatures...biggest dinosaurs – had a body temperature of just over 40C...Most animals cannot tolerate body temperatures of above 45C, so [[Apatosaurus]] is both near the upper limit..."</ref>
Der er en lille minoritet af forskere, mest prominent [[John A. Ruben]], som prøver at argumentere for at fugle ikke nedstammer fra dinosaurer.<ref>[http://scienceblogs.com/tetrapodzoology/2009/07/17/birds-cannot-be-dinosaurs/ Publishing with a hidden agenda: why birds simply cannot be dinosaurs – Tetrapod Zoology<!-- Bot genereret titel -->]</ref>
Liste over primitive fugle:
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