A can of Coca-Cola and a can of Diet Coke are the exact same size, but something magical happens when you put them in water. The diet drink floats, but the regular one sinks.

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Why is that?

While both have the same amount of liquid in them, the densities are different.

That’s because a regular Coke contains 39 grams of sugar, which makes it less dense than water.

On the other hand, a Diet Coke is less dense that water because it is made with an artificial sweetener instead, reducing the grams of sugar.

Want to learn more? Take a look at the Business Insider video below for the full breakdown.

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Credit: AP