This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.
If the file has been modified from its original state, some details may not fully reflect the modified file.
Extinction of the dinosaurs. Artwork of flying reptiles near the point of impact of a large asteroid. This asteroid is impacting the Earth's atmosphere at a speed of several kilometres per second. It is is some ten kilometres across. An event like this is thought to have caused the extinction of the dinosaurs 65million years ago. The asteroid hit the ocean, sending tsunamis (massive waves) around the globe, destroying coastal areas. Water vapour thrown into theatmosphere lowered global temperatures. Plant and then animal life began to die off. The dinosaurs never recovered, and mammals rose to become the dominant formof life.