Superior, Wisconsin (Lake Superior) Port Captain Scott Kellett suggested sharing this impressive video he recently found on the Internet. The 40-minute video imagines what could be learned about each Great Lake and the overall Great Lakes system if the lakes could be drained to reveal the secrets of their bottoms in detail. The result is amazing and incredibly insightful. Using impressive animation techniques based on extensive lake floor surveys supplemented by human and robotic exploratory dives, the video reveals waterfalls hidden from view for 7 to 8000 years, evidence of ancient seismic activity, likely evidence of a huge asteroid impact, and more. I highly recommend setting aside 40 minutes to view this in its entirety. To view click Drain the Lakes Video.