Analysis of rocks in the Outer Hebrides has provided a tantalising Clue that Mars may contain habitats which can potentially support life. Mars horizon [Credit: Bernhard Lelle/Dreamstime]As preparations continue at NASA for a mission to Mars in 2018, researchers studying rocks on Barra and the Uists have demonstrated that hydrogen – which is essential for life – is formed by earthquakes.  On Mars there are 'Marsquakes' which may...

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