SUNSET: 
NASA’s Curiosity Takes Step Toward Solving Mars Methane Mystery
New measurements from NASA’s Curiosity rover show that methane concentrations near the Martian surface vary on a daily cycle. The finding could help reconcile conflicting data.
A Possible Solution to Mars’s Methane Problem
A small amount of seepage could explain conflicting measurements of methane in the Martian atmosphere.
The Martian Methane Mystery Continues
The most advanced instrument ever sent to Mars to study its atmosphere has failed to find any methane after months of searching.
New Study Confirms Methane on Mars – But It’s Not Definitive
Independent methane detections in the Martian atmosphere by the Curiosity rover and Mars Express orbiter add confusion to a convoluted story.
Methane and Other Organics on Mars
The Curiosity rover has detected organic molecules in ancient rocks on Mars.
Curiosity Finds Methane, Other Organics
NASA’s Curiosity rover has detected both methane in Mars’s atmosphere and carbon-bearing organic compounds in its rocks. But it’s unclear where these molecules come from — or whether there’s any biological connection.
Methane Goes Missing on Mars
The Curiosity rover conducted super-sensitive tests of the Red Planet's atmosphere for methane — the most abundant hydrocarbon in the solar system — and found none. What does this finding mean for the search for Martian life?
