South Dakota State University

​When rain water runs down city streets and into storm sewers, it can be carrying a lot of filth with it – filth such as E. coli bacteria, which may end up in rivers. There could be an inexpensive and efficient new way of ridding the water of that bacteria, however, using chips of waste steel.

The standard test for determining cyanide exposure currently takes 24 hours. Now, however, a scientist at South Dakota State University has developed a sensor that detects cyanide within a blood sample in just 70 seconds.