[erickejah (OP)]

A device developed by Michael Bernitsas, a professor in the Department of Naval Architecture and Marine Engineering, can harness energy from slow moving ocean and river currents. The machine is called VIVACE. It could open the door to a new, reliable and affordable alternative energy source.
http://www.engin.umich.edu/newscenter/feature/vivace/

[chris]

How does it work?

[AB Hammer]

LOL Old technology but small water wheels []
Paddle/water wheels have been doing that on rivers and waterways for hundreds of years. What I am saying is that the technology comes from the ancient ideas. But this means ancient is not always obsolete.