Seabreacher  

DVice has a post on a device which, from a practical point of view, seems to be entirely useless - but is probably a lot of fun if you are happy to waste some fuel - the Seabreacher submarine, which is an interesting example of biomimicry.

We're fans of personal submarines, sure, but anyone with a couple million dollars lying around can get one of those. No, we like stuff more exclusive, more rare, and more resembling marine life. That's why we love the Innespace Seabreacher, a two-seater submersible made to look and move like a dolphin. A follow-up to the company's original one-seat design (called — wouldn't you know it — the Dolphin), the Seabreacher uses the same canopy as an F-22 fighter jet, keeping the roomy interior nice and dry inside a watertight seal.

The best part is how it jumps: Made to move like a dolphin, the vessel uses the downward lift of its wings to jump out of the water, and it can even do barrel rolls. Just check out the video of the Seabreacher in action below.