You might notice what look like road crews, hovered over small boxes by the side of the road in our area for the next few weeks.
But they're not workers.
They're scientists from the Ontario Geological Survey, looking for the route of a long-gone underground river system connecting Georgian Bay and Lake Ontario.
The Laurentian Channel is thought to roughly follow the route of the Nottawasaga River.
The scientists are using gravity detection devices to measure tiny fluctuations in gravity, to figure out where the ancient river system ran.
The goal -- according the geological survey -- is to figure out how much water is in the aquifers that still exist, and help with future planning when it comes to land use.