Nature provides us with unlimited opportunities to witness miracles, if only we have the patience to observe this beauty. As a diver the hardest part of one's job is the constant need for unlimited oxygen. And the time it takes to resurface could potentially kill the moment for an underwater photographer or just the casual diver. Well meet the Poseidon Discovery a military-style system that recycles your air. It makes that possible with the most user-friendly version yet of a rebreather, a device that recycles your exhaled air, removes carbon dioxide, and adds oxygen. A scuba device in comparison quickly burns through tanks of fresh air. On a typical dive, the Poseidon Discovery lets divers stay underwater at least three times as long as scuba gear can, and since you don't exhale into the water, you don't create bubbles or noise that can scare off fish. Military and advanced divers have used rebreathers for decades, but they're pricey rigs (about $10,000) that require extensive training on how to manually mix gases in case the gear fails. Stone's recreational model automates the safety system with built-in computers that check all components pre-dive, plus two oxygen sensors that monitor the gas mix.

If the system spots an air-recycling malfunction, the mouthpiece vibrates and blinks an alert. Just flip its lever to inhale from a small fresh-air tank and return safely to the surface.

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