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Hi, I'm Cory with science news that you can use.

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Why do plants grow up?

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Is it because they go towards light?

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That's true, but plants also use gravity to know what is up and what is down.

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On Earth, plants can sense the direction that gravity is pulling them, and they grow in the opposite direction.

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Oh, and what happens in space when there is no up or down?

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Experiments in space have shown that in less gravity, plants still grow towards light.

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NASA scientists are planning more experiments in space to better understand why plants still grow towards light,

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even though there is no gravity present.

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NASA knows plants will be important in space because they will consume the carbon dioxide we exhale,

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give us oxygen and food, and purify our water.

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To learn more about plants in space, check out our website.

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Until next time, I'm Cory with cool science news that you can use.

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NASA Jet Propulsion Laboratory, California Institute of Technology