Nautical engineers have long dreamed of a craft that could race across wave tops like a speedboat and seconds later dive beneath them like a submarine. But crossing the two breeds presents a catch-22: Subs need heft to sink, but speedboats need to be lightweight to go fast. With an investment of nearly $2 million and years of research, former auto-shop owner Reynolds Marion of Lake City, Florida, has finally hit on a solution, a machine he’s dubbed the Hyper-Submersible Powerboat. When complete, it will reach speeds of up to 45 mph and dive down to 1,200 feet.

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It’s not necessarily laziness that makes people hit the “snooze” button in the morning. Most likely, your body clock is mismatched with the demands of your life.

Your clock is controlled by the suprachiasmatic nucleus, a part of the brain that controls the body’s biological rhythms. But, says Jean Matheson, a sleep-disorders specialist at Beth Israel Medical Center in New York, these preset natural rhythms often don’t align with daily realities—work or school start times cannot be adjusted to fit a person’s sleep schedule.

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Swimming around in their tank, these autonomous robotic jellyfish move alone or in a swarm and communicate with their brethren to avoid underwater collisions. Developed by German industrial-automation company Festo as an attention-grabbing experiment in cooperative robotics, each AquaJelly uses eight bendable “tentacles” to propel itself forward.

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