Cretaceous Earth Impact
Geologic period: K-T Boundary
Earth and K/T impact
About this image:
Whether a meteor alone caused the extinction of dinosaurs is subject to considerable debate. But field research clearly shows that a major meteor impact does coincide with the boundary of the Cretaceous and Tertiary periods, called the K/T boundary, when many forms of life on earth became extinct.
Karen shows this impact and the dramatic effect it would have had on the Earth and its atmosphere.