People aren't talking about setting up Moon bases and throwing rocks at Earth, for example."

VOA: standard.2010.04.21

Sometimes I guess therejust aren't enough rocks.

VOA: standard.other

Curiosity remained in contact with ground controllers, but it can't zap rocks, snap pictures or roam around until the problem is fixed.

NPR: Mars Rover Curiosity Stands Down After New Problem

These distractions could be minor like how the rocks just don't look like rocks or you can clearly see a sailboat off in the distance when a group of people are suppose to be Lost.

ENGADGET: High-def presenting new challenges to set designers HD

Dating the rocks in London doesn't tell you the age of the London Underground.

BBC: NEWS | Science/Nature | Early life thrived in lava flows