It's always exciting to hear about projects to bring water to everyone, especially given that so many areas of the world are experiencing droughts.   I can't imagine anything worse that not having access to clean drinking water, for animals or people.

So I was very interested to hear about a project in India to revive a medieval way to fight the drought in the area of Karnataka.

The BBC have got a video on it, but essentially an enormous system of water channels connected by tunnels built by Medieval kings with pick axes and shovels sustained life in the settlements above.   These tunnels were carved out well below ground and they were discovered five years ago by Professor V Govindankutty.   A main well - known as a mother well - is dug in the place where there is enough water and taken to the place where you need it.   Volunteers spent ages clearing the channels of debris and silt.  

These techniques were developed in Ancient Persia, i.e. a very long time ago.  With the ancient system begun again with about 50 wells in the area, they've all started having water.  To date, none of them have dried up.   Even in May, the area is still getting a good supply of water.  

This is a very exciting discovery and I hope more places which experience tremendously dry spells will take a look at it.