Scientists discover sacred sinkhole cave under Chichen Itza pyramid

A group of scientists from the Autonomous University of Mexico announced on 13 August, that a sacred sinkhole cave, known as a cenote, has been discovered under Chichen Itzas grand Kukulkan Castle Pyramid, a discovery that could shed new light on the ancient Mayan civilisation. Aug 14, 2015

California uses light-blocking plastic balls to conserve water

Battling a record dry spell that has left reservoirs badly drained, the Las Virgenes County water district on the outskirts of Los Angeles has decided to fill its reservoir with hundreds of black plastic balls. The balls sit on top of the water and block the sunlight from hitting it, helping to reduce water evaporation as well as natural contamination and certain chemical reactions that could cause algae blooms in the reservoirs. Aug 13, 2015