“Ancient” data: A researcher wishes to study a portion of a road where asphalt crumbles and cracks more quickly than other parts of the very same road and determine the causes of that. She might want...

“Ancient” data: A researcher wishes to study a portion of a road where asphalt crumbles and cracks more quickly than other parts of the very same road and determine the causes of that. She might want to plot the road topology against known geological data of the region around which the road is built. In this case, the data that she will be using might have been collected 50 or 100 years ago!