![DYK Question Mark](http://upload.wikimedia.org/wikipedia/commons/thumb/4/44/Nuvola_apps_filetypes.svg/55px-Nuvola_apps_filetypes.svg.png)
- ...that one of the largest rainwater harvesting projects in the world was being implemented in the rural areas of the state of Karnataka, India?
- ...that Lough Hyne is a marine lake that was probably freshwater until rising ocean levels flooded it about 4000 years ago?