Environment
Spongy minerals could explain why Mars gives off methane burps
Zeolites – volcanic minerals that easily trap and release gases – could be responsible for the burps of methane that occasionally come from the Red Planet
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Zeolites – volcanic minerals that easily trap and release gases – could be responsible for the burps of methane that occasionally come from the Red Planet
We're prepared for visiting aliens, but not for the feelings they could prompt, says Michael Madsen, the film-maker behind The Visit: An Alien Encounter