When water in two beakers is exposed to a high voltage, a floating water bridge forms between the beakers. Credit: Elmar Fuchs, et al.

While it's one of the most important and abundant chemical compounds on Earth, water is still a puzzle to scientists. Much research has been done to uncover the structure of water beyond the H₂O scale, which is thought to be responsible for many of water’s unique properties. However, the nature of this structure, governed by hydrogen bonds, is currently unknown.

When exposed to a high-voltage electric field, water in two beakers climbs out of the beakers and crosses empty space to meet, forming the water bridge. The liquid bridge, hovering in space, appears to the human eye to defy gravity.