This robot can tell when sewers need repairing by scratching the walls

Now they need to develop a robot to repair the sewers! :-)

"Because many modern sewage systems were built decades ago, constant underground monitoring is needed to prevent major leaks."

The Swiss Federal Institute of Technology actually has a research group focused on construction robotics.

This robot can tell when sewers need repairing by scratching the walls | New Scientist (behind paywall)