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Because no one has seen them

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Strong evidence about former existing life has been found on?

Strong evidence or half-life has been found on the planet Mars.


Was there live on Mars?

There has been no evidence found that there was ever life on mars.


What is Mars the soil composed of?

Mars soil is primarily composed of basaltic rock, which is rich in iron and magnesium. It also contains minerals like olivine and pyroxene, along with some sulfur compounds. Additionally, there are traces of water molecules and organic compounds found in the Martian soil.


What materials are found in mars?

· Water · Organic material · hydrogen, silicon, potassium, thorium, and chlorine


Why do people agree that there was life on Mars?

Well, Mars's conditions is almost like Earth's. Therefore people agree there was (or is) life on Mars. Wither that, or there are LUNATICS who make people gullible enough to believe in aliens ;)


Did NASA found anything on other planets?

Yes, NASA has discovered many interesting findings on other planets, such as evidence of water on Mars, methane on Saturn's moon Enceladus, and organic molecules on Saturn's moon Titan. These discoveries help us understand the potential for life beyond Earth.


What has been found so far on Mars?

Some of the key findings on Mars include evidence of water in the past, seasonally changing polar ice caps, geological features that suggest a history of volcanic activity, and traces of methane in the atmosphere that may indicate potential signs of microbial life. Recent discoveries have also highlighted the presence of organic molecules in Martian rocks.


Have there been meteors from Mars found on earth?

Yes.


What year was water found on mars?

water has never been found on mars you might mean the moon. Edit: Water has been found as ice, but not liquid. Sorry I don't know the year.


Why do these regions lead scientists to hypothesize that there may have once been life on mars?

Regions on Mars that show evidence of past water flow, organic molecules, and potential sources of energy, such as methane, lead scientists to hypothesize that life could have existed on the planet. These conditions resemble those necessary for life on Earth, suggesting that Mars may have once been habitable.


Do aliens have houses on Mars?

No life has been found on Mars as of yet - and no intelligent life exists there. As such, there are no alien houses on Mars.


Are there worms on Mars?

Not that we know of. Although precursors to organic compounds have been detected, robotic exploration on Mars has found no evidence of Earth-like living things, now or in ages past. Since Mars has no liquid surface water, and little current tectonic activity, there is no obvious location for hidden fossils or sediments.