Lake Huron sinkhole shows secrets of how life evolved on earth
The Middle Island sinkhole in Lake Huron, a few miles off the Alpena coast and 100 feet down, is a perfect simulation for what early earth was like, more than 4 billion years ago.
The Middle Island sinkhole in Lake Huron, a few miles off the Alpena coast and 100 feet down, is a perfect simulation for what early earth was like, more than 4 billion years ago.