In a potential landmark discovery, scientists using the James Webb Space Telescope have obtained what they call the strongest signs yet of possible life beyond our solar system, detecting in an alien planet's atmosphere the chemical fingerprints of gases that on Earth are produced only by biological processes.

The discovery was made on a massive exoplanet known as K2-18b that that for years has captivated scientists searching for life outside of Earth.

A new discovery could represent the most concrete evidence of alien life to-date, but scientists caution that further studies are needed.