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  • When Did Dinosaurs Go Extinct? Cretaceous-Tertiary Boundary ...

    Thanks to a new calibration of the versatile argon-argon dating technique, geochronologists have established a more precise date for the dinosaur die-off at ...

    www.sciencedaily.com/releases/2008/04/080424140400.htm - Similar

  • Cretaceous-Tertiary extinction event

    The Cretaceous-Tertiary extinction event was a period of massive extinction of species, about 65.5 million years ago. It corresponds to the end of the ...

    www.sciencedaily.com/articles/c/cretaceous-ter... - Similar

  • The KT extinction

    This extinction event marks a major boundary in Earth's history, the K-T or Cretaceous-Tertiary boundary, and the end of the Mesozoic Era. ...

    www.ucmp.berkeley.edu/education/events/cowen1b.html - Similar

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