This motorised hydrofoil surfboard can "fly" above the water at a top speed of 25 mph. It is controlled with a handheld remote and it can be used on still or choppy waters. The eFoil costs a ...

Business Insider spoke with expert navigator Tristan Gooley, author of "How To Read Water: Clues & Patterns from Puddles to the Sea", about how the light reflections in water have hidden clues to ...