Do any rivers flow uphill?

It always does — right? But under Antarctica's ice, water can sometimes run uphill. Under the right conditions, a whole river can spurt from one lake uphill to another lake. That's because the ice weighs so much that it presses down on the water with thousands of pounds of pressure per square inch.



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Do rivers flow upstream or downstream? Usually, rivers flow downstream, but there are some that don't. This can happen when rivers flow south to north due to the source of the river being higher up in the South. One famous river that has this type of flow is the Nile River in Africa.

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In this week's Maphead, Ken Jennings explores how a canal changed the river's flow from north to south.

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Why the Tonle Sap River Is Unlike Any Other River in the World. In this week's Maphead column, Ken Jennings explains how one river in Cambodia ends up changing direction a few times every year.

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Over millions of years, much of this water is recycled between the inner Earth, the oceans and rivers, and the atmosphere. This cycling process means that freshwater is constantly made available to Earth's surface where we all live. Volcanoes release massive amounts of water from the inner Earth to the atmosphere.

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The Nile is a major north-flowing river in northeastern Africa. It flows into the Mediterranean Sea. The Nile is the longest river in Africa and has historically been considered the longest river in the world, though this has been contested by research suggesting that the Amazon River is slightly longer.

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Other rivers that flow south to north include: St. John's River in Florida, the San Joaquin River in California, the Red River running through several southern states, the Shennandoah in Virginia and West Virginia, the Ob, Yenisey and Lena Rivers in Russia, and the Mackenzie River in Canada, to name just a few.

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