Bird from dinosaur age in Antarctic


Vegavis iaii pedigree

From the Google cache.

Bird from dinosaur age in Antarctic

Date: 1/20/05 at 8:22PM

Playing: I’m a little dinosaur, by Jonathan Richman

AFP reports:

Fossil Fowls Raise Bird Questions

Jan. 20, 2005 — Modern birds may have evolved before the mass extinction of the dinosaurs some 65 million years ago, the event conventionally believed to have shaped animal diversity today, a study says.

The first recognizable bird appeared during the Jurassic period about 150 million years ago, if the landmark fossil called Archaeopteryx — a descendant of dinosaurs that grew feathers and took to flight — is a guide.

During the subsequent Cretaceous period, birds developed widely, establishing major lineages.

But many experts believe that it took the extinction of the dinosaurs — wiped out by climate change triggered by the impact of a giant asteroid or comet — before birds, like mammals, were able to evolve into the extraordinarily diverse class and shapes they are today.

This “big bang” was facilitated mainly because the surviving species from the mass extinction were able to exploit habitat niches vacated by the dinosaurs.

That theory is now contested by the discovery of a fossil in Antarctica by palaeontologists from Argentina and the United States.

The bird, discovered on Vega island, was called Vegavis iaii.

See also here. And here.

3 thoughts on “Bird from dinosaur age in Antarctic

  1. Posted by:
    +roguetown

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    Date: 01/20/05 at 9:26 PM
    It’s really mind-blowing to fathom mass extinction by a comet. It’s always fascinated me.

    – Rogue

    Posted by:
    dearkitty

    Date: 01/20/05 at 9:42 PM
    The comet theory mentioned in this article (and not elaborated there) is the most widespread theory on the mass extinction of dinosaurs. However, not all scientists agree with it: see, eg, http://www.marxist.com/scienceandtech/dinosaurs_extinction.htm
    More evidence is needed.

    RE: dinosaur age in Antarctic
    Posted by:
    dearkitty

    Date: 05/18/05 at 10:35 PM (2M2w ago)
    Dinosaur special: Extreme palaeontology
    21 May 2005

    Bob Holmes

    Magazine issue 2500

    There ain’t no mountain high enough or valley low enough to keep dinosaur hunters from their quarry, as New Scientist discovers
    HIGH up in the mountains, the skeleton of a large meat-eating dinosaur is gradually emerging from the rocks. Nearby are some other early Jurassic fossils that have yet to be fully excavated – an allosaur, an unidentified predator and a herbivore. It sounds like a regular day in the field, but there’s one big difference. This is Mount Kirkpatrick in the Transantarctic mountains, 4 kilometres above sea level and just 600 kilometres from the South Pole (see Map).

    The skeleton, a cryolophosaurus or “frozen crested lizard”, was discovered a decade ago. But the work is difficult and excruciatingly slow because sub-zero temperatures make machinery unreliable and fierce storms keep workers tent-bound for days at a time. Philip Currie, director of the Royal Tyrrell Museum in Drumheller, Alberta, Canada, spent a month at the site on his most recent visit and managed only six days of useful work.

    Like

  2. Pingback: Noisy dinosaur age bird discovered in Antarctic | Dear Kitty. Some blog

  3. Pingback: New Antarctic fossil mammal research | Dear Kitty. Some blog

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