CHICAGO (CBS) -- A mystery lurks at the bottom of Lake Michigan—and it's not a shipwreck ... This past August, scientists finally got up-close pictures of the sinkholes—and found they range ...

At 7:30 a.m. it crossed over Chicago and blew out onto Lake Michigan at nearly 55 miles ... 10-foot-high inland wave crashed onto the Chicago shoreline from the Chicago River north to Wilmette ...

ARCADIA, MI – The remains of this 131-year-old shipwreck are easy to spot as they peek out of the sand along the Lake Michigan shoreline ... bushels of corn from Chicago to Point Edward ...

THE DNR HAS ALSO RECEIVED ADDITIONAL REPORTS OF SICK OR DEAD WATERFOWL, MOSTLY MERGANSERS, ALONG THE LAKE MICHIGAN SHORELINE IN MILWAUKEE ... SICK BIRDS ALONG THE CHICAGO LAKEFRONT LAST MONTH.