> The biggest problem for the beating Clock will be the effects of its human visitors. Over the span of centuries, valuable stuff of any type tends to be stolen, kids climb everywhere, and hackers naturally try to see how things work or break. But it is humans that keep the Clock’s bells wound up, and humans who ask it the time. The Clock needs us. It will be an out of the way, long journey to get inside the Clock ringing inside a mountain. But as long as the Clock ticks, it keeps asking us, in whispers of buried bells, “Are we being good ancestors?”
http://longnow.org/clock/