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Aquifers are a layer of permeable rock underground.

They can hold water and are the basis of wells.

Like a giant sponge, they soak of ground water

Ground water is water which has trickled through gravel and soil and becomes deposited beneath the surface.

300 million people do not have access to safe drinking water, and that population continues to grow.Researchers for UCL (University College of London) have mapped Africa and carried out continent wide analysis and discovered a basin on water (mostly in the Northern region) beneath the surface.The total capacity of water is about 75m of thickness. When you relate that to the area of the top half of Africa, the amount of water isScientists say that the climate changes which created the Sahara desert pushed the water into the aquifers below, creating a vast resource of water hidden beneath the surface 5000 years ago.The researchers confirmed this by relating to hydro-geographical maps of the continent.However scientists do not recommend drilling as the groundwater is not yet researched and must be tested.If they give the all-clear, geologists say instead of large scale extraction, small scale sites should be established such as wells, as they are more efficient.But also, rapid use of these aquifers will result in the deposits being rapidly depleted without any recovery.Please leave your comments below!