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.
It is unlikely that there was life on Mars.
Other scientists disagree about the origin of the carbon-rich substance.
The scientists only studied one meteorite.
There is a scientific consensus that life exists on other planets.
