From litter to invasives, the Great Lakes have their share of problems ... to educate and track the spread of nurdles, features a map of documented observations of nurdles along shorelines ...

“Most of upper North America was covered by glaciation. But why, in this particular area, (are there) these Great Lakes?” said Aibing Li, a seismologist at the University of Houston who co ...

The Great Lakes refer to the five large lakes in eastern North America. They are Lakes Superior, Michigan, Huron, Erie and Ontario. Together, they cover an area of about 245,660 sq km. They form ...