(Water can flow uphill if it is under pressure in an enclosed pipe, such as a natural tunnel in ice).

They are still testing their powers; some rivers have changed their courses, and there is one that flows uphill.

Because water cannot flow uphill, you need not look between the point and the lower edges of the roof.

Then, deliberately, the water began to flow uphill.

You know that water does not flow uphill.

Water would not flow uphill, even in Themis.

The air that comes in contact with the warmed slopes becomes warmer and less dense and flows uphill.

In fact, they exhibited all the satisfaction of someone who has hit upon a method for causing water to flow uphill.

And everyone knew that once the lad had got the feel of it he could persuade water to flow uphill.

"Yes, the river does flow uphill, here," Ivy explained in the morning.