A group of scientists examined a meteorite from Mars and found a carbon-rich substance that is produced when microorganisms decay. They concluded that the meteorite provided evidence there was once life on Mars. Why is this an emerging idea? Check all that apply.

The claim is an emerging idea because the evidence is limited and scientists do not agree on what it means. Other scientists disagree about whether the carbon-rich substance came from microorganisms, and the researchers studied only one meteorite. Those points make the conclusion tentative rather than established.

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