Why did Leonardo da Vinci call water “the juice of life”?

Because all life on Earth is, on average, 80% water. If a person loses water in the amount of 1% of his weight, he will feel intense thirst, and the loss of 10% of the fluid may be incompatible with life.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.