Conceptual illustration of the Cretaceous mass extinction event with an Alamosaurus dinosaur (bottom) in the forefront. The K-T extinction, an abbreviation for Cretaceousâ??Tertiary extinction, also called the Kâ??Pg extinction or Cretaceousâ??Palaeogene extinction was a sudden mass extinction of three-quarters of the plant and animal species on Earth, approximately 66 million years ago. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Witton, Mark P. |
Bildgröße: | 5474 px × 6386 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |