Dead fish are a source of food for bacteria, which then extract oxygen from the river. AAP

How is oxygen ‘sucked out’ of our waterways?

Hundreds of thousands of fish have died in low-oxygen water. Here’s what actually happened to the oxygen, and why we might see more deaths in the coming weeks.
The March for Science will build on other rallies that encourage the use of scientific evidence in forming policy. AAP Image/Mal Fairclough

Why we’re marching for science in Australia

March for Science rallies will take place in cities around Australia on Saturday 22 April. A volunteer organiser explains why he and others are participating.
Warragamba Dam, supplying drinking water to over four million residents of Sydney.

Axing water overseer could leave regional Australia high and dry

Summer is coming and, with it, dry conditions for many parts of Australia. While it may be difficult to imagine for city dwellers, parts of regional Australia will likely face severe water shortages over…

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