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We now know that Mars once had liquid water on its surface and probably had a much denser atmosphere than it does now.

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Q: How was Mars was once similar to Earth?
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Related questions

Are earth and Mars similar?

Yes, they are similar in size, and there is evidence that there was once water, a stabil magnetic field, and an atmosphere on Mars.


What is the planet that is the most similar to earth?

Mars


How are earth and mars similar with their respect to rotation rate?

They are very similar. Earth rotates once in 23hr 56 min while Mars rotates in 24hr 39 min


Which planet is similar to Mars?

Mars is very similar to Earth. Mars' year and day are very similar to Earth compared to other planets.


Do mars and earth have a similar mass?

No. Mars has about one tenth of Earth's mass. Venus, howevr, does have a similar mass to Earth.


What planet is similar to Earth?

Mars


Is Mars a similar to another satellite etc in your solar system?

Mars is most similar to Earth.


Does Mars have a earth sign?

Mars is full of frozen water and once was like Earth


What planet besides earth once had water on it?

mars


How long does mars take to spin once around its axis?

It takes Mars about 24 hours and 39 minutes for the planet to spin once around its axis. This is equal to one day on Mars, and is similar to one day on Earth.


Which planet has seasons similar to earth?

Mars.


What planets are those similar to earth?

mars