What Really Caused Ice Age Extinction

    Published: 06-16-2009
    Views: 7,001
    Researchers have known that climate changed killed out many large mammals in the latest Ice Age but now they know there was a more specific cause.

    About 25,000-15,000 years ago it was really cold, leading to a mass extinction.  Researchers have long known that it was climate change that killed many of the large mammals in the latest Ice Age, but the question has been--what’s the specific culprit or their smoking gun?  Clues found in Arctic sediment samples and gut content from permafrozen mammals revealed that is was the loss of protein-rich forbs that caused a loss in megafauna resulting in a lack of the vegetation that mammals had eaten before the massive cold. So the temperature may have rebounded but the vegetation itself didn’t and therefore the mammals consuming it did not either.