It’s one of the biggest unanswered questions in science – is there life beyond Earth?And if so, where is it hiding?

Now, scientists from Cornell University believe they have taken a major step forward in the search for aliens.

In a new study, they claim that planets harbouring alien life may give off a distinctive purple hue.

We are just opening our eyes to these fascinating worlds around us,’ said Dr Lisa Kaltenegger, co-author of the study.