1.   But now, like the fragile images on cave walls, progress threatens USENET.

2.   Cro-Magnon man drew lifelike images of his prey on cave walls.

3.   Human figures are as rare here as they are on cave walls.

4.   In an age of specialization, the world needs more generalists, and people who not content to be defined by the painting on the cave wall.

5.   It is poignant because the arts have helped mankind deal with reality since stories were told round the fire and we drew on cave walls.

6.   Maybe scrawl a few crude paintings on the cave wall.

7.   Prehistoric people first made patterns and images by rubbing chunks of charcoal and iron oxide onto cave walls.

8.   Since ancient hunters started drawing pictures on cave walls, human beings have been trying to pass along their life stories to future generations.

9.   Since time immemorial people have painted on cave walls, tree bark, house walls, paper, canvases.

10.   The cave walls are jagged and crumbling, and there is no natural light.