Astronomer Royal

Eventually though, as more data is gathered from more atmospheres and as chemists fail in finding alternative explanations for biosignatures, the scientific consensus will slowly and gradually shift towards the probability that life does exist on other worlds, according to Prof Catherine Heymans, from Edinburgh University, who is Scotland's Astronomer Royal.

But even if the Cambridge team obtains a five sigma result, that won't be conclusive proof that life exists on the planet, according to Prof Catherine Heymans of Edinburgh University and Scotland's Astronomer Royal, who is independent of the research team.

The data has not yet passed the threshold of being described as a discovery, but has led many astronomers, such as Scotland's Astronomer Royal, Prof Catherine Heymans, of Edinburgh University, to sit up and take notice.

"Robots are developing fast, and the case for sending humans is getting weaker all the time," says Lord Martin Rees, the UK's Astronomer Royal.

The next morning he wrote to the Astronomer Royal.