Is that a water tester in your pocket?
Your smartphone can help you discover what's living in the neighbourhood pond.
Technology developed by researchers at the University of Houston in the US will let you test for waterborne pathogens by using your smartphone.
This image was taken using their technique. It’s a crowd of pond water protists overlooking an ostracod (seed shrimp) eating a buffet of spirogyra (long string-like chlorophyll structures).