"The technology to mark a surface must have pre-dated the development of written language, because written language cannot exist without ink or similar marking devices.

Which means, there's a good chance that graffiti is the oldest form of written communication."

Avatar the comic book? Think again...

This is Time Spirits, created by Tom Yeates and Steve Perry published by Marvel Comics’ creator-owned Epic line back in 1985.

1998 and still the best

Epigenetics

images courtesy of google video