Six years ago we told you about the Australian-designed Scorkl, a mini compressed air tank that allows users to breathe underwater for up to 10 minutes. For easier on-the-spot refills, the 2.0 version ...

We’ve got cars, motorcycles and bicycles that are electric, so why not hookah air pumps for diving? They make much less noise than their gas and diesel-powered counterparts, they don’t stink up their ...