the tallest waterfall in the world is actually underwater. An underwater waterfall seems counterintuitive; however, experts consider the Denmark Strait cataract as the world's tallest. The Denmark ...

Meet BIKI, the underwater drone that swims like a fish. The robofish comes equipped with an Ultra HD 4K camera and can dive up to 196 feet. BIKI can be controlled via an app on your phone/tablet ...

This waterproof action camera shoots in 4K at 120fps, captures stunning low-light footage, and lasts up to 160 minutes on a charge—now $199.