Nasa Mars announcement live: space agency announces that it has found water, potentially making planet habitable

So far, Nasa has only said that it will announce that a 'Mars mystery' will be 'solved’

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Nasa is set to make one of the biggest announcements in its history later, teasing the press conference with only a note saying that it will announce a Mars mystery has been solved.

"NASA will detail a major science finding from the agency’s ongoing exploration of Mars," it said in a statement. Many have expected that the event will bring an announcement that it has found water on Mars — a discovery that could lead to a whole range of new findings.

The conference begins at 4.30pm UK time, or 11.30am in Nasa's local Eastern Daylight Time.

The agency is set to release details of its findings, as well as take questions from reporters and members of the public.

Follow live as scientists gear up for the mysterious announcement.