Listening to ABC Radio National in the car the other day I heard Robyn Williams on the Science Show discussing how pervasive banned chemicals are. Based on samples taken from waste water treatment plants, scientists at the Research Center for Environmental Security at Arizona State University in Phoenix are able to analyse the health, the diets, and . . .
In the pre-technology era, coal miners would carry caged canaries with them for the duration of their shifts. The birds acted as an early warning system for toxic gasses such as methane and carbon monoxide: if they reached levels lethal to humans, the more sensitive canaries became sick or died, signalling to the miners they . . .