Scientists narrow down source of Martian methane

Mars Express

The European Space Agency’s Mars Express orbiter has been circling Mars since 2003. (Spacecraft image credit: ESA / ATG Medialab; Mars: ESA / DLR / FU Berlin, CC BY-SA 3.0 IGO)

It may sound like an April Fool’s joke about flatulent aliens, but this is serious: The scientists behind the European Space Agency’s Mars Express orbiter think they know where a smelly outburst of Martian methane came from.

Any joke would fall flat, because the proposed explanation is purely geological rather than, um, biological.

The source of Martian methane has been a mystery for 15 years, thanks in part to earlier findings from Mars Express.

Get the full story on GeekWire.

About Alan Boyle

Award-winning science writer, creator of Cosmic Log, author of "The Case for Pluto: How a Little Planet Made a Big Difference," president of the Council for the Advancement of Science Writing. Check out "About Alan Boyle" for more fun facts.
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