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Hi, I'm Ariana.

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And I'm Ariana with more science news you can use.

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Did you know that there was a remote-controlled car on Mars?

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On July 4, 1997, Pathfinder landed on Mars

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and sent out a small robot called Sojourner to explore.

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How did NASA control Sojourner from Earth?

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With radio waves.

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But Mars is so far away.

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Right. The radio waves took about 11 minutes to make a round trip.

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But NASA scientists had a good solution.

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They sent instructions to Mars once a day.

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Then what?

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Pathfinder recorded the instructions it received from Earth

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and then sent them on to Sojourner.

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What's going to happen in the future?

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This time, NASA will talk to the rovers using two satellites

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already in orbit around the Red Planet.

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These two rovers will be bigger, go farther, and operate longer on Mars.

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To find out more about exploring Mars, check out our website.