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Did egg-laying cause dinosaur extinction ?

Posted on Thursday, 19 April, 2012 | Comment icon 17 comments | News tip by: Still Waters

Image credit: Gerhard Boeggemann

Scientists have suggested that egg-laying may have been a factor in the extinction of the dinosaurs.

Scientists including University of Zurich's Marcus Clauss believe that a key factor was the limitation egg-laying imposed on the size of the infants upon birth, the young dinosaurs were forced to compete with adults of smaller species for food as they grew up. "That was not a problem for 150 million years but as soon as something happens that takes away all the large species so that only small species remain, if there are no small species to remain you are gone as a whole group," said Clauss.

"Given physical limitations to egg size, dinosaurs had comparatively small young."

  View: Full article |  Source: Telegraph

  Discuss: View comments (17)


Recent comments on this story
Comment icon #8 Posted by tailormaneinafog on 20 April, 2012, 14:03
I like it. It fits with my own ideas perfectly.
Comment icon #9 Posted by Conrad Clough on 25 April, 2012, 0:46
How about: the fact that the dinosaurs, large and small were successful for ~180 million years with out going extinct, and during all that time they were egg layers. the fact that this 'theory' doesn't address the other extinctions that happened at the same time such as mass microbe and marine invertabrate extinctions, the extinction most of the marine reptiles (which while also egg layers would likely not have faced the same environmental pressures given the vastness of the oceans), and a general decline in diversity of fish and insects. the fact that there are still egg laying ... [More]
Comment icon #10 Posted by Englishgent on 25 April, 2012, 2:01
Agreed And the birds managed to survive whilst still laying eggs. In fact birds are (apparently) descended from dinosaurs.
Comment icon #11 Posted by Englishgent on 25 April, 2012, 2:02
Oh well, something you can now add to your latest theories. Keep them coming
Comment icon #12 Posted by Hilander on 27 April, 2012, 1:19
I have a hard time believing that.
Comment icon #13 Posted by catfishyeah on 7 May, 2012, 13:59
Dinosaurs aren't extinct, they live under the ocean.
Comment icon #14 Posted by Erudite Celt on 18 May, 2012, 4:16
The only problem with the theory is that the overwhelming majority of dinosaurs were smaller than a modern sheep. The other anomaly I find with these theories is that reptiles and mammals don't usually compete for the same resources. So why should one out-compete the other?
Comment icon #15 Posted by Paracelse on 18 May, 2012, 11:34
Last week dino extincted because they farted too much, now it's because they egged too much what will it be next time? They all became vegans and overgrazed the planet?
Comment icon #16 Posted by Conrad Clough on 18 May, 2012, 14:59
The fact is Dinosaurs are not extinct at all, I can hear one singing outside my window as I type this.

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