Scientists have developed an AI system that detects aliens with 90 per cent accuracy.
Researchers say that the new technology is a "significant advance" in the human race's ability to discover other forms of life across the solar system and beyond.
Many of the components required for life - such as amino acids - have been detected in space but experts find it hard to determine whether they are biotic, meaning that they are actually a sign of life.
Lead researcher Dr. Robert Hazen, from George Mason University in Virginia, said: "This is a significant advance in our abilities to recognise biochemical signs of life on other worlds.
"It opens the way to using smart sensors or unmanned spaceships to search for signs of life.
"These results mean that we may be able to find a lifeform from another planet, another biosphere, even if it is very different from the life we know on Earth.
"And, if we do find signs of life elsewhere, we can tell if life on Earth and other planets derived from a common or different origin."