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The system also has a bright star which will make it easier to look for life signs in the planets' atmospheres.

Many are optimistic of detecting life signs on a faraway world within our lifetimes - possibly in the next few years.

Even if they don't find life signs on K2-18b, the team has 10 more Goldilocks planets on their list to study and possibly many more after that.

The technique may soon resolve a number of scientific mysteries on Earth, including the origin of 3.5 billion-year-old black sediments from Western Australia -- hotly debated rocks that some researchers contend hold Earth's oldest fossil microbes, while others claim they are devoid of life signs.

Because it's still the same face technically with some life signs on it.