16 Aug by Stu Hamilton in News ReleasesComments A High-Tech Robot Is Zigzagging Across Lake Michigan This Month Tethys is a robot that is sampling Lake Michigan at depths from 9 to 150 feet. Measuring oxygen, temperature, electrical conductivity, and chlorophyll and it is also equipped with sonar to measure backscatter associated with zooplankton density. http://ow.ly/uNUC3037xQn