The extinction of large animals in the Levant may explain why prehistoric humans did not paint on cave walls in Israel, new research from Tel Aviv University published on Monday has suggested.

These early artists decorated walls of caves with delicate, dramatic animal paintings. The multicolored cascades of prey and predator animals -- bison, deer, bears, cattle, mammoths, and reindeer ...

And how does it affect science? Extinction is a natural part of life. But that doesn't mean we have to forget what extinct species look like. Whether in cave paintings or films, humans have been ...