“There is nothing softer and weaker than water, and yet there is nothing better for attacking hard and strong things.”The Chinese sage Lao Tzu stated this paradox in his ancient text, the “Tao Te Ching.” Indeed, water’s ability to wash, soothe and nourish contrast with its brute power, as exhibited by Niagara Falls , the Grand Canyon (carved over time by the Colorado River) and tsunamis.Similarly paradoxical, water is both extremely familiar making up nearly two-thirds of our own bodies and covering three-quarters of the planet and extremely mysterious. Though you know it so well, many of its properties will completely surprise you. Others are so strange that they still elude scientific understanding.

Source: The Surprisingly Strange Physics of Water