|Mark explains the history of the Keweenaw Waterway. |
We are aboard the SS Agassiz, one of the vessels Michigan Tech runs out of its Great Lakes Research Center.
|We are headed northwest out of the Waterway toward the open lake. |
That's the Portage Lake Lift Bridge, which links Houghton and Hancock.
|Captain Roblee and Terrianna instruct Denali, Ryan and Jonathan on the usage of the ten-thousand-dollar instrument that measures depth, temperature, and oxygen content of Lake Superior.|
|The kids take down the data for later reference in the limnology lab at the GLRC.|
|Terrianna is casting for phytoplankton and zooplankton.|
|The kids sift through samples they've dredged from the lake floor, forty-six meters below.|
|In the limnology lab, Trent and Ryan dissect fish stomachs.|
|Julia reviews the Great Lakes food web, which differs from lake to lake.|
|What's in there?|
|To her extreme delight, Isobel found a wriggling bloodworm in one of the lake samples.|