I love waterfalls, and there are so many of them here in Iceland where I am now.

The country has 10,000 waterfalls like this one, Seljalandsfoss, on the southern coast.

Why do waterfalls not run out of water?

Before we get to Connor's question, let's focus for a minute on Iceland.

Iceland has a lot of waterfalls for a couple of reasons.

For one thing, it's wet.

It rains a lot in Iceland, as you can see, and it snows a lot to.

And then there's the glaciers.

Over thousands of years, ice and snow accumulated to form large glaciers, which today cover about a 10th of the country's landmass.

So when this ice melts, as some of it does every spring and summer, that water needs to find somewhere else to flow to.

That's where Iceland's mountains come in.

The tall mountains help melting ice and rainwater flow downwards.

Not only that, a high level of volcanic activity on the island means that its landscape is full of dramatic edges and sharp cliffs, which have over time formed powerful, majestic waterfalls just like this one.

Seljalandsfoss.

While it's hard to imagine the glacial water that flows over this waterfall ever running out, some waterfalls do dry up depending on the season and the weather.

For example, Yosemite Falls in the United States gets its water from snowmelt, so there's a lot of water flow in the spring as the weather gets warmer, and usually by late summer, the water runs out.

So waterfalls can and sometimes do run out of water, especially in the height of the dry season, or if the climate changes.

So it's always a good idea to admire one whenever you get the chance.

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