I have found this picture in several places on the net without a reference to the book they came from.
If one were to use use these words in Google, and yes you can cut and paste all the words. If you have some time on your hands you should be able to find the source, I'm out of time and need to get back to my work.
"Saber tooth tigers lived in Europe and North America. They were fast runners for short distances and probably ambushed their prey in packs. The Hoplophoneus species lived 20 million years ago. The Smilodon species lived during the Pleistocene from 1.6 million years ago to 10,000 years ago when it became extinct."
