Something interesting, but a little morbid, for an October Monday.
From The London Times Online:
If Man were to vanish from the face of the Earth today, his footprint on the planet would linger for the mere blink of an eye in geological terms.
Within hours, nature would begin to eradicate its impact. In 50,000 years all that would remain would be archaeological traces. Only radioactive materials and a few man-made chemical contaminants would last longer — an invisible legacy.
Man’s environmental footprint would, according to a report in New Scientist, begin to deteriorate almost immediately, with light pollution the first to go as power stations ceased to provide energy.
Glass and steel tower blocks that create city skylines would mostly fall down within 200 years. Brick, stone and concrete structures would last longer. With exceptions — the pyramids are already 3,000 years old — by the next millennium there would be little more left than ruins.