Enjoy the Mainichi Shimbun's "spot the difference" puzzle. The rules are simple: find the seven differences between the two pictures. (Illustrations by Kanna Fukasawa, Tokyo Design Team) Click/tap ...

The team of researchers from the University of Michigan and Bowling Green State University, for example, recently carried out a study that identified Microcystis, a type of algae abundant in Lake ...

They must also be more careful in the way they use livestock manure and other forms of organic waste to fertilise the soil or ...