These then link to a web-based dashboard where survey data can be tracked on Google Maps and Google Earth, according to Water for People.

CNN: Going with the 'FLOW' towards better sanitation

Although scientists have long recognised that mid latitudes were warmer when dinosaurs walked the Earth, some researchers have held to the view - partly based on the previous shell data - that different ocean currents must have operated at the time, leading to warmer polar temperatures but, crucially, cooler tropical temperatures.

BBC: Dinosaurs felt the heat