Prehistoric giants

Can someone provide a satisfactory answer as to why the earth’s fossil record includes evidence of so many enormous creatures? Is it higher oxygen levels? Larger landmasses?

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This entry was posted on Tuesday, April 24th, 2007 at 2:32 pm and is filed under General. You can follow any comments to this entry through the RSS 2.0 feed. You can leave a comment, or trackback from your own site.

  • Kent
    This program purports to answer you:

    http://www.bbc.co.uk/radio4/science/thematerialworld_20040212.shtml

    The whole discussion is on suggested evolutionary pressures which drove the appearance of the sauropods and the associated large carnivores. The reason why similar pressures haven't developed in the Cenozoic, however, isn't explicitly addressed.

    Indeed, isn't there a similar proliferation of large animals today? Elephants are rougly the same size as a T-rex, and blue whales are bigger than the sauropods.
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